CeramCool Liquid Cooling made from the aluminum nitride ceramic Alunit cools packing densities of up to 75W / cm². Until now the elongated, rod-shaped heat-sink has only been manufactured using the alumina material Rubalit (≥22W/mK); extruding linear shapes was not possible with the more thermally conductive alumi-num nitride ceramic material Alunit (≥170W/mK).