uxcell 10 x Silver Tone Aluminum Heat Sink 20x15x10mm for TO-220 Transistors Product Name : Heat Sink;Material : Aluminum Size : 20x 15x 10mm / 0.8" x 0.6" x 0.4"(L*W*H);Screw Mount Hole : M3 Screw Hole Color : Silver Tone Weight : 24g Package Content : 10 xHeat Sink