... stainless steel ball by deep drawing, 2) 304 material with mirror polished outside, 3) Provide professional OEM service. We're ... parts as required. DesignAccording to customer's drawing with the format like .dwg/.igs/.stp/.pdfMaterialStainless Steel, ... Aluminum, Galvanized steel, Spring Steel, Brass, Bronze, CopperFinish mirror polishing, PVD coating, powder painting, anodizing, heat treatment, nickel ...