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.