144C56 For Liftmaster/Sears/Chamberlain Chain Cable Idler Pulley Square Openers
144C56 For Liftmaster/Sears/Chamberlain Chain Cable Idler Pulley Square Openers Will also fit Craftsman Chain Drive Square-Rail Garage Door models. Specifications:Square Rail PartThis idler pulley applies to tension to guide the chain cable through the end of the rail closest to the door.
144C54 For Liftmaster/Sears/Chamberlain Belt Drive Idler Pulley Garage Openers
144C54 For Liftmaster/Sears/Chamberlain Belt Drive Idler Pulley Garage Openers Will also fit Craftsman Chain Drive Square-Rail Garage Door models. Specifications:Belt Drive idler pulley