Carts consist of wire shelves with plastic split sleeves, two one-piece handles, donut bumpers and casters. Chrome-plated models are suitable for a variety of dry environments and include 5" (127mm) polyurethane casters with plated caster horns. Super Erecta Shelf construction makes units easy to assemble and makes relocation of shelves quick and simple. Open wire construction minimizes dust accumulation, maximizes visibility and air circulation.