1.The Heat sink have a layer of adhesive on the back of them.
2.Simply peel the adhesive off and stick onto your board.
3.It’s function is to cool down the board and make your operate safely.
4.Reduce the risk of hardware failure because of overheating.
3.Product Dimensions:0.79 * 0.39 * 0.39 inches
3PCS*Aluminum Heat Sinks