The extension kit for C-channel chain 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 ReliaG 800 model 2022 gaarage door opener ◾ Genie 37028A Control Board for Genie Models 2022 2024 and 2042 Chain / Belt Drive Openers
◾ Works for the following models only:
◾ ReliaG 800 (2024) PRO Series 1 Piece Rail
◾ QuietLift 800 (2042)
◾ ChainLift 800 (2022)