4 pieces 25mm black anodized aluminum heatsink can be used for passive cooling of the development boards such as raspberry pi, etc. These heat sinks have profiles which are short enough (0.4in/10mm) to fit within standard cases such as those for Raspberry Pi. The pre-applied thermal conductive adhesive tape, makes it easy to install and efficient in heat dissipation. The large surface area of this heatsink in compare to those conventional small heatsink kits, creates more efficiency for heat dissipation for cooling the development boards, mSATA, IC chips, CPU, GPU, RAM, VGA, etc.