Bergquist SP2000-0.015-00-24 Thermally Conductive Insulators Higher Performance, High Reliability Insulator, 0.015 Inch Thickness, 1.7 x 1.187 inch, TO-3, TO-66, Sil-Pad TSP 3500 Series / Also Known as Sil-Pad 2000 Series, IDH 2192471