... ,bonding, punching, stamping,milling, CNC machining,polishing 2 surface treaments for heat sink clear anodizing, oxidation process, powder ... coating, brushing, sandblasting,shot blasting,polishing,milling 3 Surface color: natrual ,black,matt black, green, red,yellow, ... as your request.6.Structure: 9-curved model steel, welded by the high quality professional 3-ways-connected structure.7.IP55 ...