Available in residential and commercial grades, the 111MD Multi-Pass Pocket Door Hardware supports doors up to 150 pounds, the 100MD handles up to 200-pound doors and the 200MD can hold doors up to 400 pounds per individual door. The hardware is available with extruded aluminum I-beam tracks with four-wheel ball bearing hangers or aluminum box shape tracks with convex rails and three-wheel ball-bearing. Up to 192 inches of custom tracks can be created.