... .surface:nickel,zinc,chrome or N/A 3.standard: SO,DIN,AISI,JIS or as your request Item NameStainless Steel Hexagon ... NutBrand NameZhongguMaterialCarbon steel, stainless steel, zinc alloy, aluminumStandardDIN, ISO,DIN,JIS, BSW, ANSI or as your requestSurface Treatmentnickel, white zinc ...