1.Standard:DIN,JIS,GB,BS,USS,etc
2.Material: stainless steel,carbon steel ,brass,aluminum.brass alloy etc
3.Finish:black ,zinc-plating.zinc yellow ,HDG,Nickel-plating etc
4.Experience:We have over than 10 years of producing and supply washers,80% of our products are exported to oversea .We own the conmtitive price ,high quality,excellent service and prompt delivery