... Sink,Short and thick copper heat pipe,2)Evaporation segment (heating),Condensation segment ... and high performance. 2,Copper column-shape heat pipe Aluminum LED heat sink,Bonded fins,Zipper fins ... and extruded finsFeature:heat pipe+copper base+aluminum fins 3,Many shapes ... ,please contact us for more info. 4,Material: Extrusion Aluminum 6063, Al6061,etc. 5,Surface treatment: Mill ...