Chamberlain 7710CB 10 ft. Chain Drive Rail Extension Kit
The Chamberlain 10 ft. Chain Extension Kit includes a rail extension and replacement chain that are compatible with most Chamberlain chain drive models. It is for garage doors up to 10 ft. in height and comes with complete installation instructions. Designed specifically for 7 ft. sectional doors.
- For use with garage doors up to 10 ft. high
- Works with most chamberlain chain-drive models (exceptions: models PD220, PD222, HD220)
- 5-piece rail system fits garages with 7 ft. high garage doors
- Comes ready to install with complete instructions
New In Box Condition.