drop in replacement for iso 6432 standardized cylinders. Single-acting spring return. These cylinders are used in a myriad of mro and oem pneumatic automation applications. Zinc-plated steel rod jam nut, 303 stainless steel piston rod, polyurethane rod seal, anodized aluminum end cap, zinc plated mounting nut, sintered bronze rod bearing, nbr o-ring seals, neoprene bumper, brass piston, polyurethane piston seal, bonded ferrite magnet, 304 stainless steel body