Extrusion led bulb heat sink external diameter: 62.75 Height:51.25mm Fin:15fins Finish:anodizing Extrusion led bulb heat sinkexter diameter: 62.75*51 ... ,bonding,punching,stamping,milling,CNC maching,polishing2 Surface treatments for heat sinkclear anodizing, oxidation process, powder coating, brushing, sandblasting,shot ... -28117172 Fax:0755-28118820 Mobile:13480924581 Driving led bulb E27 heat sink