Chamberlain 41A4813 Garage Door Opener Chain Pulley and Bracket Genuine Original Equipment Manufacturer (OEM) Part Full Chain pulley bracket for LiftMaster garage door openers 1990 thru current. Compatible with LiftMaster garage door opener Estate Series chain drivemodel 2565, 2575, 3575 (all models may not be listed). Compatible with LiftMaster garage door opener models 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 all models may not be listed. 8360 DC Battery Backup ChainDrive MyQ