Ring joint gasket 1)Standard: ANSI B16.5, API605, DIN, UNI, EN, GOST, ... JIS, BS. 2)Material: A105, RST37.2(CT20), 16Mn, SS304 Ring ... joint gasket 1.Standard: ANSI B16.5, API605, DIN, UNI, EN, GOST ... -preventative oil, Black Painted7.Packing: Poly- wooden case or Pallet Ring joint gasket