The KL-128/1000/M is a Seifert-manufactured extruded, grilled heat-sink designed for use with various types of packages including SOT93, TO218, TO220, TO247, and TOP3. The product offers superior thermal performance, ranging from 25-50 watts depending on the package type being used. The heatsink also features a number of mounting holes for easy installation. Additionally, the product is resistant to corrosion, weathering, and durable for extended use.