The extension kit for C-channel Belt Drive garage door opener rails is to be used in addition to a 7' (3-piece) chain rail to accommodate an 8' high door
For Genie silent max 1000 and quiet lift 1200 belt-drive garage door openers only
The Genie Master Belt Drive Extension Kit is an extension for C-channel and T-type rails to be used in addition to the 7 ft. (3-piece) rail to accommodate an 8 ft. high door.
The extension kit is designed specifically for Genie belt drive openers.
Belt and instructions included
Compatible Genie SilentMax 1200 SilentMax 1000 QuietLift 800 and BeltLift