The Chamberlain-8 ft Belt-Drive Extension Kit is compatible with Chamberlain Whisper Drive and Whisper Drive plus belt-drive garage door openers.
Fully Compatible: The Belt Drive Rail Extension Kit for 8-ft high garage doors is required for reliable, everyday operation of Chamberlain® belt drive models in 8-ft garage door applications
Easy Setup: Featuring a quick-install extension rail and replacement belt, the kit includes all necessary hardware and instructions for a quick and easy installation
Proven Quality: Rigorous quality testing ensures lasting performance
Quick Specs: Weight 6 -bs.; 1.25-in x 1.00-in x 37.70-in
Additional Assurance: One-year warranty
About Chamberlain: The largest and most dependable garage door opener manufacturer in North America