This chain drive extension kit is for use with Chamberlain Power Drive chain drive garage door openers featuring the quick-install rail system. It works on garage doors up to 8' high and includes rail extension, replacement chain/cable and all necessary hardware.
| | Chamberlain #7708CB 8' Steel Rail Extention Kit |  | 35.12 |  |
 | Chamberlain 7708CB Garage Door Rails - Chain Square Rail Extension Kit - 8' |  | 27.8 | |
 | Chamberlain 8 ft. Chain Drive Extension Kit 7708CB |  | 32.29 | |
 | Chamberlain Chain Drive Rail Extension Kit for 8' High Garage Doors |  | 30.76 | |