Extruded heat sinks are often produced by aluminum as it's material character. Aluminum material is often extruded according to customer's request specifications, it's a wildly used and mature technique. Aluminum heat sinks extrusion are very popular in the thermal market as it has low cost and good thermal performance character. but only aluminum can be accepted, copper or other material are not appropriate
Process: cross cut, etching, CNC, anodize.
Surface treatment: anodize, color: customized.