This heat sink is made from high quality aluminum and will work perfectly with any Raspberry Pi  but is best paired with a Raspberry Pi 3 or 4 since it can run a little hot. It comes with thermal adhesive already applied to the back making installation super easy. Clean the surface of the chip of any dust or grease then peel off the protective film and press the heat sink firmly onto the chip. You can use this heatsink with any of our injection molded Adafruit Pi B+/2/3 Enclosures, but it may not work with other enclosures and most HATs will not fit on top with the heat sink installed.