The Seifert KL-225/25,4/SW/V with Heatsink: extruded; U; SOT32,SOT93,TO126,TO218,TO220,TO247,TOP3 is a heatsink module designed to dissipate excess heat from electronic components. It features a metal housing with extruded aluminum construction, a sealed U-shape profile, and a thermal conductivity of 25.4 W/mK. It is designed to fit a variety of component sizes, including SOT32, SOT93, TO 126, TO 218, TO 220, TO 247, and TOP3. It comes with mounting screws and optional thermal paste for easy install.