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