Aavid-Thermalloy-6398B-4-4-C-W-Bolt-On-Heat-Sink-for-TO-218-TO-220-Aavid-Thermalloy-6398B-p-A-high-power-extruded-bolt-on-heat-sink-with-large-radial-fins-and-straight-pins-Suitable-for-use-with-TO-218-and-TO-220-type-components-p-Aavid-Thermalloy-6398B-Heat-Sink-for-TO218-and-TO220-4-4-C-W-Bolt-On-Type