1).Designed by Jinsheng. 2).Material: Oil hardened and tempered 55CrSi 3).Surface treatment: powder coating

1.We are the professional spring manufacturer for OEM, such as BYD,Chery,Hama,etc.

2. Used in automotive suspension systerm.

3.Certified by ISO90001 and TS16949.

4.Cold coil by CNC coil machine.

5.Surface treatment: powder coating. Red,black,etc painting as pre customer's requirement.

6.Good fatigue life as per customer's requirement.

automobile suspension spring