Tubular Blueprint Roll File 20 Openings - Twenty 4" x 4" openings make this heavy-duty storage bin an ideal organizer for rolled maps, plans, drawings, and tubes. The four swivel casters give it high mobility. Constructed of black plastic-coated heavy-gauge steel rods. Overall dimensions: 30"h x 22"w x 18"d. Assembly required. Shipping weight 11 lbs.