Liftmaster 41B6299 Collar Model 3800 3900 8500 Collar with set screws For LiftMaster 3800, 3900, 8500 Residential Side-Mount Jack Shaft Opener LiftMaster Original Part  
Liftmaster 41B6299 Collar Model 3800 3900 8500 Collar with set screws For LiftMaster 3800, 3900, 8500 Residential Side-Mount Jack Shaft Opener LiftMaster Original Part  
$29.95