1)Column Heat Pipe Heat Sink,Short and thick copper heat pipe,2)Evaporation segment (heating),Condensation segment (cooling) Specifications:1,Watt:40W,60W, ... Light weight 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 and ...