To begin with, this pack contains 3 pieces of aluminum heatsinks. The first one’s dimensions are 14 x 14 x 5 mm while the other two are 9 x 9 x 4 mm. They feature an adhesive compound so they can transfer heat from the CPU to the air efficiently. Moreover, these heatsinks are compatible with almost every Raspberry Pi board. Although they are optimised for use with the Raspberry Pi 3 Model B board, every maker can use them with previous and later models.