... .Excellent quality. 4.Various size. 5. Best service 1.NameStainless steel flanges 2.Standard: GB14976-2002, GB13296-2007, JIS, AISI, DIN ... :304,304L, 310S, 321, 321H, 316, TP316L, 316L,etc.7.Material:Stainless steel 8.Steel grade 300 series9.Secondary Or NotNon-secondary10.Alloy Or ... .Excellent quality.4.Various size. AISI,ASTM,JIS,DIN,EN Stainless steel flange