... variety of pressure spring according customers' sample. 2.Wire Dia:0.1mm-10mm. 3.High quality and ... imported stainless steel,piano wire,carbon steel,phosphor,bronze and so on.Round wire compression springs are the ... heavy machinery. MaterialPiano wire / stainless steel wire / High Carbon Steel wire / Nickel Coated wire / Phosphor Copper wire / Bronze wire / Beryllium Copper wire.Wire Diameter0.1 mm ~ ...