... challenge tooling with large demension aluminium alloy heat sink.3.Autocad drawing or three d design for aluminium alloy ... punching,Drilling, Trimming, Cutting, CNC machining, wire-drawing, etc.3.Surface Treatment: Mill finished, Polished, Sand blasting, Anodized, Powder ... and etc.4.Purpose: extruded aluminium alloy heat sink. 3.Accessories pictures for this extruded aluminium alloy heat sink:Other ...