Wire Shelves Cylinder Transport / Inhalation Therapy Mobile Cart can transport up to 12 of the D and/or E cylinders. Protective vinyl coated Wires separate and protect cylinders. Unit consists of two u-handles, 4 donut bumpers, 4 conductive swivel casters (2 with brakes), 1 Wire shelf and 2 frames with coated Wire grid shelf. Wire finish: Chrome