... Hot-selling and best price Compression springs wire diametervariousmaterialcarbon steel,alloy spring steel,music wire steel,and stainless steel,iron,plated steel,alloy steel,bronze,red bronze,phosphor ... 1). Carbon Steel, Stainless Steel, Copper, Phosphor Bronze, Beryllium Bronze and so on or as your request2).Finish: Nickel-plated, chrome-plated, silver-plated, gold-plated, imitation gold-plated ...