... of Customers specific requirements. High quality and low price. The range of our products is wide, including Compression springs, Extension springs ... ,piano steel,SUS,alloy steel,iron,plated steel etc..6.with thickness range from 0.2mm to 3mm.7.we have passed ... .Bronze: C51000, C52100, C54400, etc 5.Iron: 1213, 12L14,1215 6.Aluminum: Al6061, Al6063 etc 7,.Carbon steel: C1006,C1010,C1018 ...