... Standard or Nonstandard:Standard 4.OEM Service:Available Copper Seal Washer, Copper Gasket Copper Gasket Specifications1) Standard:DIN125,DIN127,ISO,ASME/ASTM ... ,JIS,BS,non standard,etc 2) Material:Brass,copper,bronze(H59,H62,H683) High quality, high precision and ... . We have advantaged technologh,and can product the different copper washer professionally ,OEM service is available .Please tell us ...