ITEM NAME:3Pcs/set Raspberry Pi 4B Copper Cooling Pad Heatsink Radiator Cooling Kit J Kw.The heat sink have profiles which are short enough to fit within standard Raspberry Pi cases. Used for Raspberry Pi 4 model B+,2B. Fit:For Raspberry Pi 4 Model B. The heat sink can be applied in other devices such as the BeagleBone to cool processor, regulators, etc.