... finish,zinc plated and hot-dip galvanized 1)raw material: spring steel,stainless steel2)size: from M3 to M42,1/4 ... packing/small boxes packing6)delivery time: 30days 1)Raw Material:Spring Steel C1070,stainless steel2)Size:from M3 to M42,1 ... packing/small boxes packing6)Delivery time:30days din127 C1070 steel spring washer