The LiftMaster 178B35 curved door arm is used with the straight door arm to connect the garage door opener trolley to the garage door.
Replaces part numbers: 041B0035B, 4178B0035B, 178B32, 41B0035B, 4178B35 and 178B35B
Compatible with all Chamberlain, Craftsman and LiftMaster garage door openers.
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