Devanco Canada

 
User Name:
Password:
Remember Me:
Forgot your password
Request a Login

41A5507-6

LiftMaster Receiver Logic Board for 2500B/D (390 Mhz)

  • With end-panel
  • Also known as 41A5507-6C 41A5507-3
OSH-6233-M-N1-LH

Manaras Opera-SH 3/4 HP 208V 3 Ph Monitored ECB w/N1 Photoeyes Left Hand

  • An ultra high-end heavy-duty V-belt drive industrial jackshaft operator
  • For use on Standard High and Vertical Lift sectional doors
  • Can also be used on Rolling doors and Grilles
  • Comes with a chain hoist for manual operation and a floor level engaging device
  • Clearence: side room required 16"
  • 25 cycles per day > 100 cycles per day
  • .......more details
OSH-6532-M-N1-RH

Manaras Opera-SH 1/2HP 600V 3Ph Monitored w/ N1 Eyes

  • An ultra high-end heavy-duty V-belt drive industrial jackshaft operator
  • For use on Standard High and Vertical Lift sectional doors
  • Can also be used on Rolling doors and Grilles
  • Comes with a chain hoist for manual operation brake and a floor level engaging device
  • Clearence: side room required 16"
2000D

Chain Hoist Direct Drive Assembly 2000 D

  • Sectional door Direct drive - 1" shaft
  • Requires keyed shaft
  • Includes: 2 shaft collars Chain Keeper 1/4" Square Key 2x set screws 5/16-18
  • Fits 5-1/4" min. offset
  • Includes 26' of chain
OPH-6113-M-N1-RH

Manaras Opera-H 3/4HP 120V 1Ph Monitored Board w/N1 Eyes RH

  • A heavy-duty industrial jackshaft operator
  • For use on Standard High and Vertical Lift sectional doors
  • Can also be used on Rolling doors and Grilles
  • Comes with a self-engaging chain hoist for manual operation
  • Clearence: side room required 15"
SF375-S

Spring Fitting 3-3/4" Stationary Side Only Long Ear 1" Bore

  • Universal thread for use in either LH or RH wound springs.
  • Maximum wire size diameter: .4062".
  • Set screw installed: 3/8"-16 x 1-1/2" (2).
  • Mounting: 1" tube or solid shaft - min. 1/2 turns on the set screws.
  • Winding bar hole 5/8"
BCS-PM26

Pivin Drapeau disconnect spacer BCSI Gate Operator ** Price by Quote Only

238-202

Serco S-Hook ** Price by Quote Only

  • For Serco loading docks
3-4742

Serco Lip Assist Bar ** Price by Quote Only

  • For Serco loading docks
8-9069

Serco Latch Bar ** Price by Quote Only

  • For Serco loading docks
236-110

Serco 3/4" Klip Ring ** Price by Quote Only

  • For Serco loading docks
234-143

Serco 3/4" SAE Flat Washer ** Price by Quote Only

  • For Serco loading docks
586-1072

Serco 3/4" dia x 2-1/8" Grooved Pin ** Price by Quote Only

  • For Serco loading docks
333-042

Serco Spring (Latch Bar) ** Price by Quote Only

  • For Serco loading docks
GHW-353-1.5-RH

Doorlec Ind. Duty Jackshaft Carwash Op. 1.5 HP 575V 3P with Nema4 modification

  • With DC2000 logic board
  • Worm-Gear Jackshaft type Industrial operator NEMA 4/12
16-2101

LiftMaster Vbelt 3L 25" 3L250 *** NLA

  • This is a replacement Belt (3L250).
  • Compatible with LiftMaster® Model SW470GL Swing Operators
  • Also know as: K16-2101 G162101 162101
ZAP-8830

Zap Battery Backup 8030/8830

  • 8830 Battery Back up systems allows operation of the operator during power outages.
ZAP-8825-3-HPB

Zap 8825-3-HPB Series-3 Super-Drive Industrial Duty DC Op

  • Motor and controller: Continuous duty rated DC Motor with controller producing a powerful soft start/soft stop output of 2000 Newtons of force to drive commercial sectional doors while reducing mechanical impacts that cause premature wear of door components
  • NEMA 4X rated controller case: ZAP Controllers and push buttons are NEMA 4X compliant as a standard
  • Wiring type: C2 (factory default) B2 failsafe is standard with the addition of approved photo eye.
  • Radio control and external receiver terminals: Terminal strip provided inside the controller to provide quick convenient connections for adding external radio control receivers from any desired manufacturer
HA-434TL

SkyLink Wireless Motion Sensor

  • Supervised Sensor: monitors the sensors and their battery condition automatically
  • Motion detecting range: 40 feet.
  • Operating range: Up to 800 feet.
  • Easy to set up (Battery not included).
  • FCC/IC approved.
  • Sensors are weatherproof but not waterproof. Sheltering it from the elements is recommended
  • .......more details
4580-304-CHOC/BRN

Adseal DWS Weatherseal Silicone Adhesive Sealant 304ML Chocolate Brown 458-19

  • 304ml cartridge
  • Ideal for movement and perimeters joints
  • Meets ASTM C920 S NS Class 50 NT M GA O
  • Meets AAMA 802 and 805 standards
  • Can be used on aluminum glass masonry some plastics painted and unpainted metals & does not yellow
  • Excellent resistance to UVs for indoor and outdoor use
  • .......more details
L504AL

LiftMaster Monitored Large Profile Resistive Edge w/ Aluminum Channel 4ft

50175

Doorlec Adjustable Torque Limiter GT/GH Models 3HP Operators

  • Also known as Friction Clutch
MB-01303

Micanan Electric Motor Only 3/4HP 110V 1PH 3-Wire Base Mount FR56

  • Base Mount motor O.D.P. FR56
  • Used on Micanan's T TB APT J EJ H EHJ HHD & SD
K41-0247-000

LiftMaster Limit System INSL24UL/IHSL24UL

  • Compatible with the following models: IHSL24UL INSL24UL
K41-0244-000

LiftMaster BLDC Power/Motor Drive Board INSL24UL

  • Replacement Brushless DC Power/Motor Drive Board Service Kit
  • Compatible with the following models: INSL24UL INSL24ULMC
K41-0072-000

LiftMaster Relay Adapter Board HD

  • Compatible with the following models: INSL24UL INSL24ULMC
K41-0239-000

LiftMaster Idler Sprocket Qty 2 INSL24UL

BCSI-PM204

Pivin Drapeau Threaded Chain Tensioner BCSI Gate Operator ** Price by Quote Only

111031.0001.S

Overhead Door Link Hoist Release RSX

  • Hoist link for the Overhead Door RSX (rolling steel - hoist) commercial operator
2BXL

Control Station Exterior Surface Mount O/C N4 with Key Lockout

  • OPEN-CLOSE Push Button with Lockout
  • Metal Enclosure
  • Buttons aligned vertically H=4-3/8"" W=4-1/8"" D=2-5/8""
HCT16

LiftMaster HCT Rail Only 16'

  • Yellow zinc dichromate premium rail finish offers maximum rust protection in open-air environments.
  • Heavy-duty 12-gauge C channel corrosion resistant steel track.
  • This DOES NOT include the head unit
  • Will open a standard sectional door 15'6" high
K94-38062-2

LiftMaster Power Board ID Resistor 1HP 3PH

  • This is replacement Power Board ID Resistor (1HP 3PH). Compatible with LiftMaster® Models SL585U and SL595U Slide Operators
GHX-383-3/4HP-LH

Doorlec Explosion Proof Gear Head 3/4 HP 208V 3PH ECB Left Hand

  • Nema 7/9 control box
  • Electrical connections from motor to control box consists of hazardous location certified fittings and NEMA 7/9 O/C/S push-button station
041-0189-000

LiftMaster Dual Light Pod Kit No Camera Model

  • Dual Light Pod Replacement Kit
  • For use with various LiftMaster® Belt Drive and Chain Drive Garage Door Openers featuring myQ® technology dual light lenses and are not equipped with a video camera; manufactured after 2021 only
  • This replacement kit is compatible with the following models: 84501 84501-267 84602
HA-112-14G-22

Horizontal Angle 1-1/2 x 1-1/2 x 22" Flag Angle 14-Ga

69987.3072

Todco Original Bottom Seal Reefer Cut to Size ** Special Order Item Price by Quote Only

  • Fits Serial #30662431-1
41C2762

LiftMaster Chain Assembly Kit 7' (041D3484)

  • Also known as: 41D3484 41A3484 41C2762
  • For use with various chain drive garage door openers that utilize a T-rail and have a 7' garage door
210-0040

TNR Doors CurtainLok Assembly Kit Grey 5/ Kit (10 pcs) ** Price by Quote Only

  • 5 complete curtain locks with fasteners per kit
K20-1100C-2LP-H28

LiftMaster Electric Motor 1 HP 115/230V 1Ph Logic 5

  • Also known as: K20-1100C-2LP 20-1100C-2LP
  • For use with various LiftMaster® Logic 5.0 1-Phase Industrial-Duty Commercial Door Operators
  • Includes wiring harness
MD00008

Micanan Limit Chain with Link

O02R9000

AirLift Turnbuckle Complete

PRO-GHC-10011U-L

Micanan 1 HP 120V 1P Gearhead Operator with N1 Eyes Monitored ECB Left Hand

  • External radio control terminal strip
  • Heavy duty worm gear reduction in oil bath gearbox
  • Solenoid brake standard
  • #50 roller chain and sprockets on final drive
  • Emergency chain hoist with electrical cut-out switch for manual operation
  • Full function Smart 10.0 logic board and on-board receiver
  • .......more details
PRO-GHC-10011U-R

Micanan 1 HP 120V 1P Gearhead Operator with N1 Eyes Monitored ECB Right Hand

  • External radio control terminal strip
  • Heavy duty worm gear reduction in oil bath gearbox
  • Solenoid brake standard
  • #50 roller chain and sprockets on final drive
  • Emergency chain hoist with electrical cut-out switch for manual operation
  • Full function Smart 10.0 logic board and on-board receiver
  • .......more details
RG-K-P

Miller Edge Reflecti-Guard Pulsed Photo Eye Monitored 30ft Range

  • Monitored retro-reflective technology
  • Includes: (1) wired emitter/receiver with integrated mounting bracket (1) reflector (1) reflector bracket
  • 30 ft. range
  • Pulsed and relay models
  • Enhanced sunlight immunity
  • Impact resistant for rugged environments
  • .......more details
GAREX-PAINT-BLK

Garex Touch-Up Paint Black

  • 0.5 OZ
10.1002.9

Truck Door Rivet Mild Steel 1/4 x 1-5/16 - 1/2 HD Sold per Unit

  • Standard rivet used for installing #77 lock
  • 5 rivets are required to install the handle Sold separately
PRO-GHC-15011U-R

Micanan 1.5 HP 115V 1P Gearhead Operator with N1 Eyes Monitored ECB Right Hand

  • External radio control terminal strip
  • Heavy duty worm gear reduction in oil bath gearbox
  • Solenoid brake standard
  • #50 roller chain and sprockets on final drive
  • Emergency chain hoist with electrical cut-out switch for manual operation
  • Full function Smart 10.0 logic board and on-board receiver
  • .......more details
CP-LX900

Lynx Control Board with Cover for MDJ models

  • works only on MDJ (medium -Duty Jackshaft) models
  • UL325 compliant with B2 C2 modes
  • includes on-board Timer-To-Close
  • On-Board 372MHz radio receiver accepts 20 remotes
510.4302.06

Whiting Stainless Steel Interior Hdwr Pkg 4 Rows Hinges 6 Panel

  • This is an Add-On option when buying a truck door
510.2755.00

Whiting Welded Brackets

  • This is an upcharge when ordering certain doors
SMR7620TP5

Telco Thru Beam Receiver M18

  • Supply voltage: 10 - 30 V dc
  • Control Feature: Sensitivity pot. and light/dark switch
  • Sensing range: 20 m
  • Output Status: N.C./N.O.
  • Housing: 18 x 1 Plastic
  • 5M cable
  • .......more details
510.8000.00

Whiting Option for Short Panel Stack Up DF Door

  • This is an upcharge when ordering dry freight doors
  • Shorter panels move thru the radius of the track smoother
K52C0481

LiftMaster Bridge Rectifier

  • Bridge Rectifier Converts AC to DC voltage
  • For powering DC accessories when AC transformer present
  • Small size with convenient mounting hole in center
RS-40

Roller Shutter Aluminum Model 40 Made to Order Pricing by Quote Only

  • The RS-40 is designed for use in window roller shutters door recesses and small shopfronts.
  • These profiles are of better technical performance and are thus more stable.
  • At the same time good coil diameters allow to use this profile in small-size boxes.
  • The foam filling ensures good heat and acoustic insulation.
  • Its low weight allows the use of manual drives spring- or electric control devices.
  • The RS-40 profile is available with or without perforation in a wide range of RAL-like colours.
  • .......more details
RS-55

Roller Shutter Aluminum Model 55 Made to Order Pricing by Quote Only

  • The RS-55 is designed for use in large window roller shutters door recesses and small shopfronts.
  • Robust construction ensures high profiles rigidity while maintaining a well-shaped proportional appearance.
  • The RS-55 profile is available with or without perforation in a wide range of RAL-like colours.
  • The profiles have a very good colour fastness and high resistance to abrasion.
  • This profile is resistant to weathering.
  • Aluminium profiles are ecologically clean products.
  • .......more details
K76-37077

LiftMaster Brake Kit APT

  • Kit comes made to order
  • Compatible with LiftMaster® Model APT Commercial Door Operators; equipped with Logic 5.0.
  • Includes: solenoid cover pressure plate lever pulley and 4 #10-32 nuts
K71-416-7NH

LiftMaster Loop Detector Board 24V ***No Longer Available

  • Also known as: 714167NH G714167NH 71-416-7NH
  • For use with various LiftMaster® Commercial Swing and Slide Gate Operators
1420-134-WHITE

Elton Commercial Window for Flush Doors 1-3/4" thick 1420 White Frame Sealed Glass

  • Screw together window kit
  • Thermal window
  • Frame size: 19 1/2” x 14 5/16”
  • Cut-out size: 18 3/4” x 13 5/8”
  • Vision area: 16 15/16” x 11 5/8“
  • Different glass options and frame colours are available upon request
  • .......more details
BNC-M-F

BNC Adapter Male to F-Type Female Connector ** To Extent of Inventory

  • BNC male to F female connector
  • Designed for RG6 coaxial cables RG59 security camera etc.
  • Made of nickel-plated and gold plated contacts for better corrosion protection
BCH501L5L-BZ

LiftMaster 1/2 HP 115/230 VAC 1 PH Commercial Hoist Op L5 Carwash and Roller Bearing Mod. LH ***Replaced by CRBH501-LH

  • H-style operators include a floor level chain hoist to ease manual operation in an emergency or power outage.
  • The operators are typically mounted to the wall when used with larger sectional overhead doors with vertical or high lift and mounted to the wall or the front of the hood when used with rolling doors and grilles.
  • H operators are attached to the door jackshaft to indirectly drive the door.
  • MyQ® Technology enables you to securely monitor and control your facility operator and lights with your smartphone tablet or computer for greater peace of mind.
  • Alerts can be received as email or pop-up (push) notifications on a mobile device ensuring the status of your commercial door.
  • Security+ 2.0™ safeguards your facility – with every click a new code is sent to the commercial door operator so the door opens only for you.
  • .......more details
DEV-CHS

Devanco Chain Hoist Assembly for RSSD/RSFD

  • For use on Devanco rolling steel service doors and fire doors
BRKIT002

Manaras Brake Resistor for 240V Rapido

  • Added option to RSH or RVH operators
SSZP14-6-114

Solid Shaft 1-1/4" Keyed 14' 6" Zinc Plated

  • Actual length is approx. 14'-6"
MK01563

Explosion Proof Killark Labeled ON/OFF Key Switch

173888

Decorative Hardware Carriage Lock Installation Plate

  • Steel Zinc plated
  • Inside mounting plate for latch system carriage style
EHJX-311-1/2

Doorlec Industrial Jackshaft Op. Explosion Proof 1/2 HP 120V-1Ph

  • Explosion proof NEMA 7/9 Heavy-Duty Industrial Operator
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse.
  • Solenoid Brake prevents coasting and secures the door when closed
  • Explosion-proof (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
  • .......more details
MGH-6537-ECB-LH

Manaras 3 HP 600V 3P Jackshaft with Elect. Circuit Board Left Hand

  • A very heavy-duty worm gear industrial operator designed for use on Industrial standard high and vertical lift sectional or rolling doors and grilles.
  • It incorporates a chain hoist for manual operation with a floor level engaging device with electrical cut-out
  • Electrically activated drum-band type solenoid brake
  • Full overload protection
CDOPCK

LiftMaster 850LM with 5 x 813LM Remotes

EHJ-343-1/2

Doorlec Industrial Jackshaft Op. 1/2 HP 460V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
  • .......more details
EHJ-383-1/2

Doorlec Industrial Jackshaft Op. 1/2 HP 208V-3Ph

  • Heavy-Duty Industrial Operator for Sectional or Rolling Steel Doors
  • DC-2000 logic with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Solenoid Brake prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Automatic Friction Clutch protects the door and operator
  • Self-aligning Heavy Duty sealed Pillow Block bearings on all shafts for high cycle applications
  • .......more details
GH-353-1.5

Doorlec Industrial Gearhead Door Operator 1.5 HP 575V 3-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
  • .......more details
GH-383-1.5

Doorlec Industrial Gearhead Door Operator 1.5 HP 208V 3-Phase

  • Extra Deavy-Duty Gearhead Industrial Operator or large Sectional or Rolling Steel Doors
  • DC-2000 Logic Board with adjustable Timer To Close Delay On Reverse and Traffic Light Control
  • Worm gear reducer 40:1 ratio for high-torque and long life
  • Solenoid Disk Brake Prevents coasting and secures the door when closed
  • TEFC (sealed) continuous-duty electric motor with overload protection
  • Optional Friction Clutch available
  • .......more details
B/CDJH-12-115-ECB

Lynx CDJH HD Jackshaft with Solenoid Brake 1/2 HP 115V with ECB UL325

  • New LX100 circuit board.
  • Built-in 3-channel 372 Mhz radio receiver accepts up to 20 remotes
  • 4L V-belt primary reduction #41 drive chain and sprockets.
  • Adjustable friction clutch Inherent Mechanical Brake included
  • Solenoid brake optional **
  • Fully driven adjustable limit switches.
  • .......more details
CB18B1000

Cable 1/8" 7x19 1000' Galvanized ** To Extent of Inventory

  • Galvanized Cable 1/8" 7x19 1000ft spool.
  • Cable break strength: 2000 lbs
MOD163G

Manaras Heater in Reducer & C-Box 575V-3P 24VAC 15W + 30W

  • This modification is an option when ordering a commercial operator
K20-1075C-2LP-H27

LiftMaster Electric Motor 3/4 HP 115V 1Ph Logic 5

  • Also known as: K20-1075C-2LP-H24
  • Replacement electric motor (3/4 HP 115/230V 1PH L5). For use with various LiftMaster® Logic 5.0 Gear-Reduced Commercial Door Operators
19-5816

LiftMaster Trolley Chain Pack #48 for 16ft Door

  • Chain pack only
BRKIT001

Manaras Brake Resistor for 120V Rapido

  • Added option to RSH or RVH operators
K75-37556

LiftMaster Drive Shaft Kit SL595UL

  • Idler shaft sprocket chain and chain links
15-50B35LGH

Sprocket 50B35T 1" Bore 2 x 5/16-18" SS

  • Also known as: 159036
  • #50 with 35 TEETH 1 BORE 1/4 Key (2)5/16-18 S.S.
STATION086

Manaras 3-btn Push-Button Control Station Nema 1 Flush Mount

  • 2 N/O contacts and 1 N/C contact for stop.
  • Flush mount.
O02R9210

AirLift Bottom Cap Check Ball

O02R9209

AirLift Breather Vent

BCH501L5-LH

LiftMaster Hoist Op. with Carwash Mod.and Brake 1/2 HP 115/230 VAC Logic 5 Left Hand ***Replaced by CRBH501-LH

  • Industrial Duty Hoist Operator with Damp Environment modification.
  • Comes with CPS-UN4 photoeyes and brake
RN-3-11-6202

Roller 3" UHMW 11" Stem Black

  • 3" UHMW tire
  • 6202 sealed precision bearing
  • 11" zinc plated stem
  • Rating: 200lb load; 100000 cycles of a 12' door
  • Helps quiet the operation of jackshaft operators
SSZP17-6

Solid Shaft 1" Keyed Zinc Plated 17'-6"

BCH501L5-RH

LiftMaster Hoist Op. with Carwash Mod.and Brake 1/2 HP 115/230 VAC Logic 5 Right Hand ***Replaced by CRBH501-RH

  • Industrial Duty Hoist Operator with Damp Environment modification.
  • Comes with CPS-UN4 photoeyes and brake
RR-3-11-6202

Roller 3" UHMW + Rubber 11" Stem Black

  • 3" UHMW tire covered with rubber
  • 6202 sealed precision bearing
  • 11" zinc plated stem
  • Rating: 200lb load; 100000 cycles of a 12' door
  • Helps quiet the operation of jackshaft operators
LJH-311-3/4

Doorlec 3/4HP 115V 1PH Jackshaft Operator

42208

Doorlec Z Bracket Control Cabinet Support - Front

  • Works with various models such as ETBHW ETHW
ME112-C4

Miller Edge Clima-Guard U-Shaped PVC Mounting Channel Sold by the Foot

3228

Whiting 2" Nylon Roller 3" Shaft

  • Zinc plated shaft 10 roller ball design
  • Shaft Length: 3" Overall Length: 3.75"
RSH-6114-MON-LH

Manaras Rapido Jackshaft Operator 1 HP 120V With Elect. Board N4X Thru Beam Eyes Left Hand

  • High speed heavy-duty v-belt drive industrial operator.
  • Designed for use on properly counter-balanced standard high and vertical lift sectional doors weighing a maximum of 750 lbs.
  • Two times the speed of the standard jackshaft operator
  • Manages soft-starts and soft-stops
  • Can be wall or shelf mounted on either side of the door
  • Cast iron pillow block bearings
  • .......more details
19-5810-NP

LiftMaster Trolley Chain Pack #48 for 10ft Door Nickel Plated

  • Chain pack only
EL2000SSPKT

LiftMaster Pedestal Mounting Kit for EL2000SS

  • Compatible with model EL2000SS only.
  • Kit allows you to mount an EL2000SS unit onto a standard gooseneck pedestal.
  • Kit includes a mounting plate with gasket and hardware.
TCBOS-311

Doorlec Single Arm Barrier Gate Op 1/3HP 120volts w/ heater and DC2000 board

  • Includes 500W heater
821LMC-SENSOR

LiftMaster Extra Door Sensor for 821LMC White Units **to extent of inventory

  • Add control of your second garage door opener to Smart Garage™ Control myQ® Smart Garage™ Hub or myQ Garage®.
  • Secure control and monitor your second garage door through the myQ app.
  • Easy installation and programming.
SGP-353-1-575/3

Doorlec Gate Master 1 HP 575V/3P with Heater

  • Post mount heavy-duty industrial slide gate operator
  • Max. gate weight: 2500 lbs
  • Gate travelling speed: 45 ft / minute
  • 175 watt heater included
Q216

LiftMaster Output Shaft K07-50227 Swing Gate Op

  • Output shaft for #70 gear reducer
G-10X7-134-W

Thermal Window Clear 10" x 7" for 1-3/4" Garaga Door White

  • For 1-3/4" thick door