Frostytech has posted a review on the Arkua 7228 Copper Core Heatsink
It seems half of the Arkua heatsinks are plain and unanodized, while the rest are all anodized black. Their model 7228 is a copper-cored, black heatsink with a 60mm Delta fan up top. The heatsink is 70mm wide so a larger cooler could be used, but since 60mm fans are plentiful, and less expensive than the 70mm variety, the 7228 has been paired up this way. A special plastic fan shroud keeps the important air focused down and keeps mounting the fan a simple, rather than complex affair. While the Arkua heatsinks resemble the well known Thermosonic Thermoengines, and more recently the Thermal Integration coolers, they are different upon close inspection in several very distinct ways.Read more