The LiftMaster G3714RV 14‑Foot I-Beam Rail Assembly is a one-piece rail designed for use with compatible LiftMaster and Chamberlain chain drive garage door openers, providing smooth and reliable operation for 14 ft (4.27 m) doors.

• One-piece 14 ft I-beam rail assembly suitable for residential garage doors up to 14 ft tall

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

• Genuine LiftMaster replacement part for reliable quality and fit

• Also known by alternate part numbers: 3714PL, 3714RV, MR3714RV, 012381037148

• Compatible with LiftMaster opener models 87802 and 8587W

• For more information visit Manufacturer's Website