Pipeline Collection Double Tier Ballet Rack is constructed of heavy duty 1 1/4" diameter plumbing pipe in anthracite gray finish. Includes four 2" casters, 2 locking, 2 non-locking. Top Bar height adjusts from 63" - 78" in height. Lower Bar Height adjusts from 45"-60" in height. Tier step difference measures 18". Base: 23-1/4"D x 49-5/8"W.