Omall (TM) 100x69x36mm Aluminium Heat Diffusion Cooling Fin Cooler Easy installation for your DIY Electronic projects(as LED or computer mainframe cooling),with good heat dissipation effect; Material : Aluminium, Color : Silver Tone; Overall Size : 100 x 69 x 36mm/3.9" x 2.7" x 1.4"(L*W*H); Weight : 120g, Fin Numbers: 27 Pieces; Package Content:1x Cooling Fin,Base board thickness:4.6mm,pin board height:31mm.