... , carbon steel, stainless steel, carbon steel completely coated rubber or fluorine plasticStemCarbon steel nickel plating p, stainless steelSeal RingThe natural rubber ... NR, neoprene CR, butyl rubber NBR, three yuan YiBingJiao EPDM, fluorine rubber FKM Pneumatic device AssembliesApplicable temperature -20°C~150°C ...