Xigmatek Thor's Hammer S126384 H.D.T. Double Layer Heatsink with Overal Black Nickel Plating H.D.T. (Heat-pipe direct touch) technology Double layer HDT & Double performance. Plating Black-Nickel on whole body. 4pcs 8mm + 3pcs 6mm high performance heat-pipes Spring-Screw + Universal (LGA775/1366) Back plate