?1 Pack?Drive Gear 81B0045 41A2817 41C4220A for Liftmaster Chamberlain Craftsman Sears Garage Door Opener

Garage Door Opener Drive Gear Only(1 pack) Drive Gear Bore Size: 1/2" Drive Gear Outside Diameter: 2 3/4" Drive Gear Number of Teeth: 32 Compatible 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 belt drive models: 1280, 1280R, 2580, 2585, 8100, 8100M, 8200, 9200, WD922K, WD912KS, WD822KS 3918315SR, 13918415SR, 13918616SR, 13918847, 13918857, 13918869, 13918880, 13953100, 139531006, 13953110, 13953200, 139532006, 13953210, 13953225SRT, 13953225SRT1, 13953300, 139533006, 13953310, 13953315SR, 13953325, 13953325SRT 13953325SRT1, 13953335SRT3, 13953400, 13953403, 13953413, 13953415SR, 13953425, 13953425SRT, 13953425SRT1, 13953500, 139535006, 13953513, 13953515SR, 13953525, 13953525SRT, 13953535SRT1, 13953600, 139536006, 13953602, 13953603, 139536036, 13953605, 13953606, 13953607, 13953608, 13953609, 13953610, 13953611, 13953612, 13953613, 139536141SR, 13953614SR, 139536151SR, 13953615SR, 139536181SR, 13953618SR, 139536191SR, 13953619SR, 13953622, 139536251SR, 13953625SR, 139536261SR, 13953626SR, 13953627SRT, 13953628SRT, 13953628SRT1, 13953629SRT, 13953629SRT1, 13953632SR, 13953635SRT, 13953635SRT1, 13953636SRT, 13953637SRT, 13953637SRT1, 13953638SRT, 13953639SR, 13953640SRT, 13953641SRT, 13953644SRT, 13953645SRT3, 13953646SRT2, 13953647SRT1, 1395364812, 13953648D, 13953648SRT2, 13953650SRT, 13953651SR, 13953660SRT1, 13953661SRT1, 13953661SRT3, 13953662SRT, 13953662SRT1, 13953662SRT2, 13953664SRT, 13953664SRT2, 13953669SRT, 13953670SRT, 13953670SRT1, 13953671SRT, 13953671SRT1, 13953671SRT2, 13953671SRT3, 13953672SRT1,