BeamUP 8 ft. Garage Door Chain Drive Extension Kit 8CX Black

beamUP's 8 ft. chain and rail extension kit is specifically designed for customers with 8 ft. garage doors. The standard garage door height is 7 ft. high, so please measure your garage height before purchasing the extension kit. Our extension kit is compatible with both the Workhorse (BU100) and the Sentry (BU400) beamUP garage door opener models.