The SS sliding shelf is both functional and rugged. The shelf slides on ball bearings and extends a full 13 and mounts to any rack (rear rackrail required in steel racks). Occupies slightly more than a single rackspace.NOTE:Fits in racks with a minimum 15-1/8 from front to rear rails.Main Features:High 50 lb. capacity, with rugged ball bearing slidesNote: occupies slightly more than one rackspaceAdjustable rear support to mount in most racks (15.1 to 23.9 range)Steel construction with black powder coat finishExtends a full 13″