This Fixed Dual-Sided Vented Shelf is designed for use in standard open frame 2-post floor racks and is vented for better air flow. They are center balanced on the rack to allow for extra support in front and back, and is 18″in depth. Available as a 1-piece design which mounts from front and back of rack. They come complete with a set of #12-24 mounting screws and has a black powder coat micro finish to match rack color.