... OEM,ODM are welcomed 3)Application:auto,toy,electronic All kinds of Spring Features 1.Material:steel,stainless steel.brass, ... years4Strong enginnering teamAccurately read drawing,offer competitive price and gurantee good qualitly products5PackingInner plastic bag , outer carton ... tory 9Production lines1) The lost-wax casting of stainless steel and heat-resisting steel with silica-gel shell made ...