uxcell 10pcs DIY Project 25 x 15 x 10mm TO-220 Transistors Aluminum Heat Sink Product Name : Transistors TO-220 Aluminum Heat Sink;Material : Aluminum Color : Silver Tone;Screw Hole Dia : 2.5mm / 0.1" Max.Width(Fit IC) : 13.5mm / 0.53";Overall Size : 25 x 15 x 10mm/ 1"x 0.59" x 0.4"(L*W*H) TotalWeight : 41g Package Content : 10 xTransistors TO-220 Aluminum Heat Sink