... :2000 certificate. Good contact capacity ,long service life. steel sheet spring.Application: contact spring,home appliance,computer,camera,power box ... ,automobile spring, textile machinery parts.Material: stainless steel,copper,carbon steel,manganese steel,tinplate.Machining thickness: 0.1~2mmPrecision tolerance: +/-0 ... ,welding, burring,polishing,brushingOEM/ODM drawing welcome steel sheet spring