Material:304 stainless steel,316 stainless steel Machining process:milling,lathing,routing,refining stainless steel valve part ,1)ISO9001:2008 certification.2)Over 16 ... lathing,routing,refining ,etc Item Name stainless steel valve part Product description1)Material:304/316 stainless steel or according to your requirement.2) ... coating,pressing part,polish,etc. wedge disc for Knife gate valve part