... computer chassis cooling 10)Materials of Heatsink extrusions : aluminum or copper 11)Processing of aluminium or copper extrusion ... , CNC machining, polishing 12)Surface treatments for copper aluminum heat sinks extrusion: clear anodizing,powder coating,brushing; sand ... heatsink extrusion are various upon request 15)Features of aluminum and copper heatsink extrusion:High heat transfer rateOutstanding ...