... 3.Process:polishing,nickel plating, soft iron core:We can supply a variety of high quality stainless valve,air Cylinders.If you ... message will be answered as soon as possible.Item Name soft iron coreMaterialStainless steel(303,304,316);Free cutting steel ( ... Surface grinding machine,etcWe guarantee our products are excellent in quality,and competitive in price.More informationin available upon receipt ...