Package Includes: 1x Ceramic Heat Sink How to Use The product is used for Banana Pi only. It dissipates heat off your Banana Pi in high efficiency. Feature 800% higher heat radiation efficiency than Copper/Aluminum heat sink ultra slim; ultra light; Simple installation; Perfectly matched to Banana Pi’s CPU; Size: 20mm*20mm*2mm Material the heat sink body is made of 100% SIC (silicon carbide)