... . 2.ISO9001,We can do OEM. 3.Provide most reasonable price. 4.Produce by samples. Liqiang spring manufactures battery spirng in ... 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 ...