... :2000 certificate. Good contact capacity ,long service life. steel sheet spring.Application: contact spring,home appliance,computer,camera,power box ... steel,tinplate.Machining thickness: 0.1~2mmPrecision tolerance: +/-0.02~0.05mmSurface finish: plating,polishing,brushing,coatingProduction process: progressive die ... drilling,welding, burring,polishing,brushingOEM/ODM drawing welcome steel sheet spring