The louvered panel provides a universal hanging surface for AkroBins and allows unlimited relocation of all bin sizes. No adjustment or relocation of rails or shelves is necessary - just rearrange the bin as desired. These versatile panels can be mounted on walls, attached to the back of existing shelving, mounted on benches, carts, inside cabinets or fastened to slotted angle components to form free standing storage bays.These heavy duty panels are 16 gauge cold rolled steel with horizontal reinforcing ribs. Slotted holes 3/4" L x 3/8" x 6" centers simplify installation. Gray baked enamel. Panel size: 18" H x 19" W and 19" H x 35-3/4" W.