Extrusion led bulb heat sink external diameter: 62.75 Height:51.25mm Fin:15fins Finish:anodizing Extrusion led bulb heat sinkexter diameter: ... punching,stamping,milling,CNC maching,polishing2 Surface treatments for heat sinkclear anodizing, oxidation process, powder coating, brushing, ... ,black,matt black, green, red,yellow,silver,white,blue,andother,surface colors upon request reasonanable price + ...