... port:Shanghai7.Advantage:1.Our engineer is specialized in extrusion aluminum profile for more than 20 years.Very ... & sharp edges, punching,Drilling, Trimming, Cutting, CNC machining, wire-drawing, etc.3.Surface Treatment: Mill finished, Polished, Sand ... , Chromating, Passivating, Electrophoretic coated and etc.4.Purpose: extrusion heat sink aluminum profile. We could manufacture according to your ...