... .75 Height:51.25mm Fin:15fins Finish:anodizing Extrusion led bulb heat sinkexter diameter: 62.75*51.25mm surface treatment ... 9001:2008 Certification:AL information:1 Processing of heat sinks precison cutting,drilling, skiving,deburring,fine blanking,soldering ... ,punching,stamping,milling,CNC maching,polishing2 Surface treatments for heat sinkclear anodizing, oxidation process, powder coating, brushing, ...