1 product Auto suspension springs 2 wire diameter 4-25mm 3 material 65Mn/60Si2MnA/55CrSi spring steel 4 certification ISO9001:2008 5 inspection fatigue test 6 HRC 46-52 degree 7 supply ability 5000pcs/day 8 MOQ 100 pcs for each item 9 delivery time within 30 days after receiving your deposit 10 validity period one year 11 packing plastic or PE bags for inner and corrugated cartons for outer 12 usage car/auto/automotive 13 trade terms FOB/CFR/CIF 14 payment terms T/T or L/C 15 discount large quantity, large discount