The Enzotech UMH Unicorn Memory Heatspreader Set is a limited edition set that provides high performance, pure copper system memory cooling heatsinks. Only 100 of these units will be made! The unique set of fin length allows for extremely efficient heat dissipation. The heat sinks are made from pure Copper that is constructed by using the forged process. Your computer RAM, just like most parts on a computer, operates faster and efficiently when it is cool - no other passive heatspreaders will work better than the Enzotech UMH Unicorn Memory Heatspreaders! Pin Fin Design: Maximize cooling of RAM Modules by improving heat dissipation. Help to eliminate system crashes due to over-clocking thermal issues. Forged Processing: Unique manufacturing process creates very dense thermal material as opposed to traditional heat spreaders. Also the heatspreads are TWICE the thickness compared to others. This results in extremely efficient heat dissipation. Efficient, User friendly design: Quick, easy installation process fits almost all motherboards and is compatible with all standard SDR / DDR / DDR2 / DDR3 products. Reduced operating temperature: Reduced operating temperature will not only help avoid system crashes but will also increase reliability, stability and longevity of your RAM modules.        The UMH sets contains 4 pairs of UMH Memory Heatspreaders 1 pair   of UMH 10 (10mm fin height) 1 pair   of UMH   3 (3mm fin height) 2 pairs of UMH   1 (1mm fin height) EMH 10 Dimensions (mm) 133mm(L) x 26mm(W)x 16mm(T) Material Pure Forged Copper Weight 124g EMH 3 Dimensions (mm) 133mm(L) x 26mm(W)x 9mm(T) Material Pure Forged Copper Weight 73g EMH 1 Dimensions (mm) 133mm(L) x 26mm(W)x 7mm(T) Material Pure Forged Copper Weight 59g