CYLINDERS CYLINDERS 1995 Air cylinders, Polyvinyl Tubing, Aluminum, Steel Springs, Plexiglass, Wood, Air Valves, Control Electronics, (Compressed Air at 60psi) Base: W21 1/2″ x H14″ x D8 1/4″, Cylinders: 18″ x 10″ x 17 3/4″, Overall Height 26″