Air Cylinder, Body Material Aluminum, Cylinder Type Extruded, Cylinder Repair Repairable, Magnetic Piston Magnetic Piston, Mounting Type Tapped Hole, Sleeve Nut, Bore Diameter 3 1/4 in, Cushion Type Head and Cap, Stroke Length 18 in, Inlet Size 1/2 in, Spring Retraction Force Not Applicable, Cylinder Action Double Acting, System of Measurement Inch, Body Material Finish Anodized, Piston Rod Material Finish Chrome Plated, Overall Height 24 3/4 in, Maximum Operating Pressure 250 psi WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)