Fischer-Elektronik-AKK-191-12-C-W-Heat-Sink-For-TO-3-Housing-Fischer-Elektronik-AKK-191-p-The-Fischer-Elektronik-12-Die-Cast-Heat-Sink-is-for-transistor-design-TO-3-with-attachable-option-The-effective-heat-dissipation-make-it-ideal-for-a-wide-range-of-applications-p-Fischer-Elektronik-AKK-191-12-C-W-Heat-Sink-For-TO3