... a large various shapes . Our facilities have been designed to expedite your battery spring requirements. We manufacture from your ... have single type,AA group type,AAA group type. MaterialPiano wire, stainless steel, High Carbon Steel, Nickel Plated, Phosphor copper ... Bronze, Copper Bronze, Beryllium Copper.Wire Diameter0.1 mm ~ 10 mm and above.Free LengthThe overall ...