... ,deburring,fine blanking,soldering,bonding, punching, stamping,milling, CNC machining,polishing 2 surface treaments for heat sink clear anodizing, ... SPTE, Tinplate), Aluminum Alloy, Red copper, Brass, Bronze alloy or according to your request.5.Accessories: International quality & standard. ... request.6.Structure: 9-curved model steel, welded by the high quality professional 3-ways-connected structure.7 ...