1) Material:carbon,alloy or stainless steel 2).high quality Flange 3) What you want are what we pursuit Product ... ., especially there are special requirements to the material of products.<P>All the materials are according to GB, JIS, ISO, ANSI ... , DIN, etc. standard, which can meet the ISO9001 quality control and inspection. <P>As long as you require, we ensure the best ...