This belt drive rail extension kit is for use with Chamberlain Whisper Drive and Whisper Drive Plus belt drive garage door openers featuring the quick-install rail system. It works on garage doors up to 8' high and includes rail extensions, replacement belt and all necessary hardware.
| | Chamberlain 8808CB Garage Door Rails - Belt Rail Extension Kit |  | 38.35 |  |
 | Chamberlain #8808CB 8' Steel Rail Extention Kit |  | 58.09 | |
 | Chamberlain Belt Drive Rail Extension Kit for 8' High Garage Doors |  | 41.8 | |
 | Chamberlain 8 ft. Belt-Drive Extension Kit 8808CB |  | 47.99 | |