Featuring a quick-install extension rail and replacement belt, the kit includes everything needed for quick and easy installation. Asked by mm September 29, 2020. Required for reliable, everyday operation of Chamberlain® belt drive models in 10-ft. garage door applications. The Chamberlain 8 ft. Chain-Drive Extension The Chamberlain 8 ft. Chain-Drive Extension Kit is compatible with Chamberlain chain drive garage door openers (Does not fit Chamberlain Model # HD220 Internet # 205215863 Store SKU # 1000053358t). The Chamberlain-8 ft Belt-Drive Extension Kit is compatible with Chamberlain Whisper Drive and Whisper Drive plus belt-drive garage door openers. 1. Chamberlain Group 8810Cb-P Chamberlain 8810Cb 10-Foot, Compatible Whisper Drive Plus Models, Includes Replacement Belt Garage Door Opener Rail Extension Kit 4.5 out of 5 stars 146 $67.60 $ 67 . Chamberlain Group G8808CB-P Chamberlain 8808CB 8-Foot, Compatible Whisper Drive Plus Models, Includes Replacement Belt Garage Door Opener 8 Ft Rail Extension Kit … Powered by Chamberlain's MAX lift power system, the B1381 delivers lifting force equivalent to 1-1/4 HP, the highest lifting capacity in the category for superior performance in extreme conditions (for comparison purposes only, lift capacity similar to 1-1/4 horsepower AC motor, and lift capacity of DC motors is typically not measured in horsepower) Answer. For use with Chamberlain garage access systems including Quick-Install Rail System Chamberlain Chain Drive Extension Kit is fully compatible with Chamberlain® chain drive models for 10-ft garage door applications; Features an easy set-up design with a quick-install extension rail and replacement chain; Durable construction for a lasting performance; Weight: 8 lb; Dimensions: 1.25 x 1 x 49.4-in (3.1 x 2.5 x 125.4 cm) Includes one-year warranty, rail extension, replacement belt, all necessary hardware and an instruction manual for easy set-up. Rigorous quality testing ensures lasting performance. 60 ($0.47/oz) $94.49 $94.49 Includes rail extension, replacement belt, all necessary hardware and an instruction manual for easy setup. Does this Extension Kit work with the Chamberlain Model #B1381 garage door opener? Shop Chamberlain Garage Door Opener 8-ft Belt Rail Extension Kit in the Garage Door Opener Parts & Accessories department at Lowe's.com.