2.0” impact extruded 6061-T6 rust resistant aluminum Chrome-plated 5/8” heat-treated steel piston rod Components made of anodized 6061-T6 machined aluminum Advanced JM92 oil for superior performance regardless of temperature Nitrile rubber bushings ensure quiet shock absorber operation LSC free compression adjuster Extremely tight triple seal system: main seal, piston rod seal, scraper seal Valves are made to maximize performance