This is an aluminum heatsink kit used for cooling the chips on Raspberry Pi. Comparing to other heat sink, it has been attached with thermal conductive adhesive tape, allowing the Raspberry Pi to cool more efficiently. Besides, the installation is simple, what you need to do is to remove the heatsink protection and stick it on Raspberry Pi.
Compatible with Raspberry Pi B.
Comes with 3 plates, of which 2 small and 1 large.