Product Overview:XJJ Garage Door Openers 41A3489 Complete Trolley Assembly.Fit For Liftmaster Chain Drive garage door openers from 1984 to present. Compatible Brand:Compatible with chain drive operators made by Liftmaster, Chamberlain, Sears Craftsman. Compatible Model:Fit for LiftMaster Chamberlain belt drive garage door opener models 1040, 1045, 1046, 1050, 1055, 1056, 1060, 100WD, 200WD, 300 WD, 1140, 1145, 1146, 1150, 1155, 1156, 1160, 110WD.210WD, 310WD, 1240, 1245, 1246, 1250, 1255, 1256, 1260 Compatible Model:Fit for LiftMaster Chamberlain belt drive garage door opener models 1260LK, 1245LK, 215WD, 220ED, 315WD, 320WD, 1240R, 1245R, 1246R, 1255R, 1256R, 1265, 985, 2265, 2565, 2245， 2255, 2575, 2595, 140, 150, 240, 350, 450, 550 Compatible Model:Fit for LiftMaster Chamberlain 700WHC, 701WHC, 1000, 2000, 4000, 4001, 5000, 710WHC, 711WHC, 1100, 2100, 4100, 5100, 7200,1200, 2200, 4200, 6200, 7220, CG40, PD210, PD610, PD612K, 7420, PD752all models may not be listed Note:Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. XJJ 41A3489 Garage Door Openers Carriage Complete Trolley Assembly Compatible with Chain Drive Operators Made by Liftmaster, Chamberlain, Sears Craftsman