Nitro-Carburized Rod for exceptional corrosion resistance and durability. Durable Plastic Rod Guide reduces potential rod abrasion. Main Seal provides positive closure for high-pressure gas. Stop Collar and Limiting Groove assure precise extended length. High-Strength Piston Assembly with Leak-Proof Seal helps prevent fluid leakage around the piston, allowing the fluid to pass efficiently through the piston valving components, providing controlled lift and consistent performance. Steel Body Pressure Cylinder is manufactured for durability and corrosion resistance.