... , SWOSC-V,50CrV material:55CrSi, SWOSC-V,50CrVOEM acceptedwe supplied valve springs for LIFAN.As the biggest manufacturer of spring in ... ,ariculture,mine,furniture,elevator and so onWide range offered wire diameter from 0.1mm to 80mm High quality and competitive pricingISO ... acceptedCustomised designs are welcome,so send us your specifications now. valve spring