Fischer-Elektronik-4-1-Cool-Rail-Heat-Sinks-Fischer-Elektronik-SK189-100SA-p-The-Fischer-Elektronik-2-8-Cool-Rail-41-5-x-100mm-Heat-Sink-has-been-manufactured-to-a-high-standard-using-raw-degreased-aluminium-&-is-ideal-for-plastic-transistors-&-relays-The-effective-heat-dissipation-make-it-ideal-for-a-wide-range-of-applications-p-Fischer-Elektronik-SK189-100SA-Heat-Sink-41-5-x-100-2-8-C-W