500 series cylinder is designed for 3000 PSI double acting hydraulic service 500 series cylinder is designed for 3000PSI double acting hydraulic serviceGland -- High Grade Ductile IronPiston -- High Grade Ductile Iron, precision machinedTube -- Cold Drawn Precision TubingRod -- Chrome Plated C1045 SteelEnd Caps -- C1045 SteelGland Seals-- Polyurethane U-cupRod Wiper -- Urethane Snap InPiston Seal ...