1) Detect Flaw : 100% ,Salt Spray Test: >800H 2) Fatigue Test:>60,000,000 Zero-defect,High quality The Suspension Spring absorb shake and made drive comfortably30 Years Experience"Shuangdi" Serial Product cover Spring and Stamping Part,such as Compression Spring,Clutch Spring,Suspension Spring,Valve Spring,Tension Spring,Torsion Spring TS16949 ISO14001 OHSAS18001 Certificated

Suspension Spring (TS16949 ISO14001 OHSAS18001 Certificated)