1.material: carbon steel. 2.finsh:The washer fasteners are nickel plated. 3.size: 6*10.2*1.0mm. Item NameSquare Washer FastenersBrand NameZhongguMaterialCarbon steel ,stainless steel,brass,ect.Surface TreatmentNickel, copper, tin, ect . It can be environmentally friendly as your request.Size6*10.2*1.0mm. Size also can be customized.PortShenzhenMOQ200000piecesDelivery Detail20~30daysPayment TermT/ ...