The heatsink pack for Raspberry Pi 3B+ includes three adhesive heatsinks made of copper and aluminum to cool different chips efficiently. This is a heatsink pack for Raspberry Pi 3B+. It contains 3 different heatsink which respectively correspond 3 different chips. It is a perfect solution for cooling the operating temperature when the Raspberry Pi are dealing with complicated work. Specification Size:Black with adhesive heat sink (large): 14 * 14 * 7mmBlack with adhesive heat sink (small): 9 * 9 * 5mmSeparate copper with adhesive heat sink: 12 * 12 * 1mm Heat sink with adhesive tape Material: copper and aluminum Weight: 4g Shipping List Black with adhesive heat sink (large) x1Black with adhesive heat sink (small) x1Separate copper with adhesive heat sink x1