The CoolerMaster HSC-V62 uses copper for both the base and the fins. It has an aluminium fan shroud which is copper anodized to make it look like an all copper unit, overall it looks very classy. The heatsink uses skived microfin technology, so there are a lot of thin fins as apposed to the normal chunky fins that CoolerMaster are better known for. The point of having a lot of thin fins as apposed to only a few thick fins is to increase surface area. The more surface area available, the more heat can theoretically be dissipated by the fan's draft.