Upgrade your garage door opener with the Liftmaster 041C5141-2 Square Rail Trolley Replacement Kit Belt Drive Garage. This trolley replacement kit is compatible with LiftMaster and Chamberlain garage door openers, and is designed to fit perfectly with the LIFTMASTER 41C5141-2 model. The kit comes with a 1-year manufacturer warranty, giving you peace of mind while using your garage door opener. This carriage/trolley replacement kit is an essential part of your garage door opener, allowing your garage door to smoothly slide open and closed. The Liftmaster 041C5141-2 Square Rail Trolley Replacement Kit Belt Drive Garage is a reliable and durable option for anyone looking to replace their current trolley mechanism. Upgrade your garage door opener today with this high-quality replacement kit.