1.Material:stainless steel 2.Standard:Nonstandard JIS,DIN,ASTM,BS,SAE,etc 3.Process:polishing,nickel plating,chrome plat We can supply a variety of high quality stainless valve,air Cylinders.If you are interested in our products,please contact with us,your message will be answered as soon as possible.Item Name Moving iron coreMaterialStainless steel(303,304,316);Free cutting steel (12L14,12L15, ...