1st- Plated Steel (.009 inch /0.23 mm)

2nd- Plated Steel (.011 inch /0.28 mm)

3rd- Plated Steel (.013 inch /0.33 mm)

4th- Coated Copper Alloy Winding (.020 inch /0.51 mm)

5th- Plated Steel (.009 inch /0.23 mm)