Chamberlain 8810CB 10-Foot Belt Drive Garage Door Opener Extension Kit, Compatible with Whisper Drive and Whisper Drive Plus Models, Includes Rail Extension and Replacement Belt by Chamberlain at N Online Agency. MPN: G8810CB. Hurry! Limited time offer. Offer valid only while supplies last. For use with Chamberlain Whisper Drive and Whisper Drive Plus belt drive garage door openers featuring the quick-install rail system.For use with Chamberlain Whisper Drive and Whisper Drive Plus belt drive garage door openers featuring the quick-install rail system.. Works on garage doors up to 10 feet high. Includes rail extension, replacement belt, and all necessary hardware. New structural steel rail system. Increases structural integrity.
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