"This is one of the highest (if not best) performing blocks currently on the market for AMD and P4 cpus. High flow, multiple, parallel 1/16" deep and wide micro channels. Channels are curved on the base to maximize turbulence. 1/2" Chrome barbs, 1/4NPT threads, black anodized aluminum cover prevents corrosion. Copper alloy 110 base is machined, lapped and polished." -
www.becooling.com