The LiftMaster G3707CH 7‑Foot Chain Drive Rail Assembly is a one-piece rail engineered for use with compatible LiftMaster and Chamberlain chain drive garage door openers, providing smooth and reliable operation for 7 ft (2.1 m) doors. Always consult your opener’s manual for compatibility before ordering to ensure proper fit and optimal performance.

• One-piece 7 ft chain drive rail assembly suitable for residential garage doors up to 7 ft tall

• Delivers stable, dependable operation with compatible LiftMaster and Chamberlain chain drive openers

• Also known by alternate part numbers: MR3707CHC, 3707PL, 3707CH, 3707CHC, MRE3707CH, MR3707CH, 012381137077

• Compatible with LiftMaster opener models 87802 and 8587W

• For more information visit Manufacturer's Website