Adjust this shelf to create a flat surface with or without an edge or tilt to the operators desired angle. The Universal Shelf can also extend behind the frame. Attach shelf dividers for better organization (Item 8985). WEIGHT: 16 lbs, WEIGHT CAPACITY: 125 lbs, MATERIALS: 12 gauge steel. INCLUDES: (1) UNIVERSAL SHELF, 12"D x 48"W, (1) SHELF BRACKETS, SET (1) PARTS & HARDWARE PACKET.