1.We provide custom design for mould springs. 2.Wire dia.:0.1-10mm. 3.ISO9001,oem ... your drawings and samples. Liqiang spring provides complete line of mould springs,which are favricated our of square and rectangle wire ... Zinc / Oxide black or CustomizableApplicationsAerospace, Industrial, Medical applications, Automotive applications, Household appliances, Electronic, Toys, Hardware tool.