Quantum Mobile Wire Shelving Unit - 4 Shelves, 36in.W x 18in.D x 54in.H., Model# RWRC4-54-1836C-1 Includes casters with brakes, which can be removed for stationary use Stands 54 1/2in. H without casters, 58in. H with casters Chrome wire construction will not rust or corrode &#160;Open wire design allows for optimal product visibility and air circulation for less dust