The RPM Sensor with motor cup is for Lift-Master, Sears Craftsman, Tru-Value, Master Mechanic, Chamberlain and some Wayne Dalton garage door openers. Genuine Liftmaster Chamberlain OEM Replacement Part Compatible with Liftmaster and Chamberlain garage door openers 1986 to current. Garage door opener belt drive models 1270, 1280, 1280R, 2280, 2580, 2585, 8100, 8100M, 8200, 9200, WD822K, WD922K, WD912KS, WD822KS all models may not be listed. Compatible with LiftMaster and Chamberlain garage door opener chain drive 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, 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, 700WHC, 701WHC, 1000, 2000, 4000, 4001, 5000, 710WHC, 711WHC, 1100, 2100, 4100, 5100, 7200, 12, Weight: 0.20062065842 pounds, Manufacturer: 41C4398a