Milwaukee Hand Trucks 40144 2-Tank Cylinder Truck with Retractable Casters This unit is capable of carrying 2 tanks of oxygen or acetylene Steel tool tray to store welding and cutting tip, gloves and goggles 200-Pound load capacity. Cylinder Dimensions:7-1/8" To 8-1/2" Diameter. 35" TO 51" Height. Oxygen Tank Style: D,Q,S. Acetylene Tank Style: WS AND WC Retractable casters allow this unit to be used in upright or tilt position 10-Inch puncture proof tires never go flat