1.material: carbon steel. 2.finish: The standoff fastener is white zinc plated. Item NameHexagon Blind Standoff FasenerBrand NameZhongguMaterialCarbon steel ,stainless steel, ect.Surface TreatmentWhite zinc ,nickel, copper, tin, ect . It can be environmentally friendly as your request.PortShenzhenMOQ50000piecesDelivery Detail20~30daysPayment TermT/T, Western UnionPacking DetailSeaworthy packing ...