1.EATON standard 2.competitive price 3.Promise quality Name:Metric Flat Seal FittingsMaterial:Carbon Steel, Stainless Steel, Brass,alloy steel etc;Surface:Cr+3 or Cr+6 Zinc Plating etc;Standard: Winner, Eaton standard;Quality Control: ISO 9001-2008;Application: Automobile, engineering Machinery, Lathe, Machinery, Metallurgy, Petroleum, mine, construction, chemical industry, shipbuilding, ...