... soldering,bonding, punching, stamping,milling, CNC machining,polishing2 Surface finish for heat sink:clear anodizing, oxidation process, powder ... coating, brushing, sandblasting,shot blasting,polishing,milling3 Surface colors:natrual ,black,matt black, green,red,yellow, ... silver,white,blue,andother,surface colors upon request4 Advantages:ODM & OEM: Foxconn supplier ...