drop in replacement for iso 15552 standardized cylinders. These cylinders are used in a myriad of mro and oem pneumatic automation applications. Cushioned, chrome plated c40 steel piston rod, zinc plated steel jam nut, polyurethane rod seal, polyurethane cushion seals, zinc plated steel cushion adjustment screw, aluminum end cap, anodized aluminum body, zinc plated steel screws, sintered bronze rod bearing, polyurethane piston seals, plastoferrite magnet, aluminum piston, support magnet, nbr o-ring seals