Extruded aluminum heat sink is one of the most popular and cost efficient heat sink, .Extruded heat sinks are the most common They are manufactured by pushing hot aluminum ingot through a steel tooling to get the extrusion bar. The most common aluminum alloy is 6063-T5, but other 6XXX alloys can also be examined as needed. then it will be manufactured by cross cut, machining, anodizing to get a complete heat sink as customer required.
Surface treatment: black anodized or natural anodized or customized.
Note: the sepc should follow the extrusion ratio