uxcell 10pcs Aluminum Heatsink Cooling Fin 21mm x 15mm x 10mm for IC Power Amplifier Product Name : IC Heatsink;Material : Aluminium Color : Silver Tone;Screw Hole Diameter : 3mm/0.12" Max.Width(Fit IC) : 12mm/0.5";Overall Size : 21 x 15 x 10mm/0.8" x 0.6" x 0.4"(L*W*H) Net Weight : 22g Package Content : 10 x IC Heatsinks