... 3)Our capacity:melting,tooling,extrusion,CNC precision machining & finishing Aluminum Heatsink with balck ... procedureDie desiging→Die making→Smelting&alloying→Extruding→Cutting→CNC machinig→Driling→Tapping→Surface treatment→Welding→Assembling→ ... Working Instruction,Inspection Instruction,Packing Instruction,PPAP(including Control Plan,PFMEA etc...),Unpacking/unloading Instruction for customer ...