... led bulb heat sink exter diameter: 127*64mm surface treatment:anodizing Extrusion led bulb heat sinkexter diameter: 127*64mmsurface treatment:anodizingGarden ... ,stamping,milling,CNC maching,polishing2 Surface treatments for heat sinkclear anodizing, oxidation process, powder coating, brushing, sandblasting,shot blasting,polishing,milling3 ...