... requirements. We manufacture a wide range of round wire torsion springs to customers individual requirements and keep ... silicon-chrome, high carbon, beryllium-copper, inconnel, galvanised wire, mild steel, phosphor bronze, brass.TypesThere are many different ... which are shown below. FinishesZinc/colour passivates, black zinc nickel, electroless nickel, black oxidise, copper plating & flashing, tin, ...