COMMERCIAL GRADE – Top Hung Pocket Door Hardware with Solid Nylon Wheel. FOR POCKET DOORS – Ideal for On-site Custom Pocket/Sliding Door Installations, 125 Lb. Capacity. PATENTED DESIGN - For 2 X 4 Interior Wall Construction, Minimum Door Thickness of 1-inch. SOLID MATERIALS – ANSI Certified Aluminum Track with Convex Rails. MADE IN THE U.S.A. - Built in the United States. Part number 100PD. A versatile single track system designed and packed primarily for "on-the-job" construction of pocket doors, but also usable in combination with itself or other Johnson components for special installations of sliding doors. Aluminum track features convex rails, jump proof three wheel hangers. Heavy gauge steel components are zinc plated for a quality appearance. Components are available in bulk for fabricators, as are fixtures for assembly of pocket door frames.