This is a Belt Drive Trolley Replacement Kit. For use with various LiftMaster® and Chamberlain® Belt Drive Garage Door Openers. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility.
Genuine LiftMaster® replacement part.
Also known as:
41B3869-1, 41B3869-3, 41B3869, 41B3869-3A
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