Genuine LiftMaster TDC48-20 #48 door drive chain kit for doors up to 20 ft for the Maxum industrial DC operators.
Fitment: LiftMaster Maxum TDC 700 trolley operators.
Cut for doors up to 20 ft. LiftMaster prints this one as "#41 Chain (3/4 & 1 HP)" while numbering it in the #48 family — call us to confirm pitch before ordering.
Ordering the right part depends on the full model number, which is printed on the operator label. Call GateHouse Supplies if you are not sure — we service these units every day.