Die spring of rectangular section used in press die mould, metal die-casting mould, plastic injection mould and mechanical equipment with rigid structure . high elasticity standard and high precision.Following American standard (ISO 10243) and Japanese standard (JIS B5012),we also offer different springs according to customer specifications. The die spring made by rectangular section occupies a large market and application, and is warmly welcomed by customers both from domestic and abroad. Lead Spring Factory provides high quality die springs, which makes your mould lasting and help you to design you mould.