Chamberlain Sears Garage Door Opener 2 Drive Gears Works With 41A2817 41C4220A This Gears Are Compatible With All Chamberlain, Sears , Liftmaster , Craftsman and Raynor Residential Garage Door Openers Produced After 1984.* Drive Gear Bore Size: 1/2" * Drive Gear Outside Diameter: 2 3/4" * Drive Gear Number of Teeth: 32Compatible with LiftMaster, Chamberlain CHAIN DRIVE garage door opener models: 1040, 1045, 1046, 1050, 1055, 1056, 1060, 100WD, 200WD, 300WD, 110WD, 210WD, 310WD, 1260LK, 1245LK, 215WD, 220ED, 315WD, 320WD, 1240R, 1245R, 1246R, 1255R, 1256R, 985, 2565, 2575, 2595, 140, 150, 240, 350, 450, 550, 700WHC, 701WHC, 1000, 2000, 4000, 4001, 5000, 710WHC, 711WHC, 1100, 2100, 4100, 5100, 7200, 1200, 2200, 4200, 6200, 7220, CG40, 7420, PD752, PD758S. Compatible with these LiftMaster, Chamberlain BELT DRIVE models: 1280, 1280R, 2580, 2585, 8100, 8100M, 8200, 9200, WD922K, WD912KS, WD822KS
