The LiftMaster 144B32 commercial garage door operator pulley from Garage Door Supply Co. is a #225-A replacement pulley for LiftMaster MJ Series jackshaft operators, LiftMaster MT trolley operators and other commercial garage door openers. The 144B32 pulley has a 1/2-in. bore and 2.25-in. outer diameter. Confirm compatibility with your model commercial operator before placing your order by checking your manual or asking us with LiveChat, email or a call.Product Highlights: