Heavy-duty commercial grade for 1-3/8'' or 1-3/4'' doors up to 125 lb. Track is heavy extruded aluminum with convex rails. Tricycle hangers (model No. 1120PPK1) provide smooth rolling action and will not derail. Includes track, 2 hangers, 2 guides, and rubber bumper. ( Refer to the 2000 Department for replacement kit for replacement hardware.) Track length: 72'' (for one 3' 0'' door).