The Enzotech UMH Unicorn Memory Heatspreader Set is a limited edition set of high performance, pure copper system memory cooling heatsinks. Only 100 of units of these will be made! The unique set of fin lengths allows for extremely efficient heat dissipation. The heat sinks are made from pure Copper and use forged processing in their construction. Your computer RAM, just like almost anything else on a computer, operates faster and stabler when it is cool - no other passive heatspreaders 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