Photo 1 of 1 Pc 144C54 Metal Idler Pulley, K144C0054M Belt Drive Square Rail, For Garage Door Openers, Fits All LiftMaster Chamberlain Craftsman Belt Drive Square Rail Garage Door, 1/2 inch I.D., 2-1/2 inch O.D.

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Photo 1 of 1 Pc 144C54 Metal Idler Pulley, K144C0054M Belt Drive Square Rail, For Garage Door Openers, Fits All LiftMaster Chamberlain Craftsman Belt Drive Square Rail Garage Door, 1/2 inch I.D., 2-1/2 inch O.D.Photo 2 of 1 Pc 144C54 Metal Idler Pulley, K144C0054M Belt Drive Square Rail, For Garage Door Openers, Fits All LiftMaster Chamberlain Craftsman Belt Drive Square Rail Garage Door, 1/2 inch I.D., 2-1/2 inch O.D.