Drive Belt for Liftmaster and Chamberlain Brand garage door openers . Lift-Master Chamberlain screw drive garage door opener models 1000SD, 1000SDR, 2000SD, 2000SDR, 4600, 4620, 4640, 9902 all models may not be listed. Features: Drive Belt for Liftmaster and Chamberlain Brand garage door openers . Lift-Master Chamberlain screw drive garage door opener models 1000SD, 1000SDR, 2000SD, 2000SDR, 4600, 4620, 4640, 9902 all models may not be listed.
