... :ANSI,DIN,JIS,BS,EN carbon steel,stainless steel,alloy steel,Aluminum steel Description of Cap:Production NameASTM A234 WPB Carbon Steel Cap,pipe fitting large diameter ,ansi b16.9 ... B16.9, ANSI B16.28, DIN 2605, ISO3419,DIN EN10253,JIS B2312, JIS B2313, MSS SP-25, MSS SP-75, BS1387Raw materialCarbon steel , stainless steel, alloy steelCarbon Steel ...