... )OEM,ODM are welcomed 3)Application:auto,toy,electronic Extension SpringFeatures 1.Material:steel,stainless steel.brass,aluminum,brass. ... ,powdered,golden etc., 3.All our products are made by high-quality steels and first-class producing process 4. ... products5PackingInner plastic bag , outer carton box, and advised by customer.6Surface TreatmentPowder coating,neikel plating,chrome plating,zinc plating ...