Hello. Welcome to Futurlec. The electronic components Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help. TO-220 TO220S - TO-220 Heatsink with Fins - Black Aluminium Photograph Features Suits TO-220 Devices Small Compact Size Light Weight Dimensions: Length - 20mm, Width - 10mm, Height - 20mm