uxcell 10Pcs Silver Tone Aluminum Heat Sink 20x15x10mm for TO-220 Transistors These pure aluminum heat sinks include adhesive thermal tape for efficient thermal transfer to the heat sink providing additional cooling to the IC. These heat sinks have profiles which are short enough to fit within standard Raspberry Pi cases. These heat sinks can be applied in other devices such as the BeagleBone to cool processor, regulators, etc. Use heat sink adhesive glue to install heat sink on the IC.Glue is not included here. Please check the specification table and make sure that the size of the heat sink fits that of your component.