Standard-Duty Chromate Wire ShelvingAssembly required Adjustable feet compensate for surface irregularities Posts are double grooved every 8" and numbered for easy adjustment Capacity is based on evenly distributed weight Shelf ribs run front to back allowing items to slide on and off shelves smoothly Post's circular grooves combined with tapered plastic split sleeves allow for assembly in minutes with no special tools Shelves with open wire design minimize dust, improve air circulation