Product Name: Manufacturer of Spring Bush for Commutator Shape: Coil Production Process: Cold Roll Load Type: Compression Usage: Commutator Material: Steel Function: Pressed Trademark: TJ Transport Package: Wooden Carton Origin: Ningbo China HS Code: 85030090 Product Description The spring is make from different materials, such as spring steel, carbon steel,etc,it is not normal spring, it applied in commutator,increase the strength of commutator,and sure the inner hole will not dehisce when the shaft press into the hole of commutator.Send you spring of drawing,we will offer you high quality product in Oriental.If you are interested in the spring for your commutator,do not hesitate to inquiry us for more...O.D of wire:1.5mmLength:13mmO.D:13.3MM