... . We manufacture a wide range of round wire torsion springs to customers individual requirements and keep ... stainless steel, silicon-chrome, high carbon, beryllium-copper, inconnel, galvanised wire, mild steel, phosphor bronze, brass.TypesThere are ... passivates, black zinc nickel, electroless nickel, black oxidise, copper plating & flashing, tin, chrome acid passivate, colour dyeing, silver ...