The Pi 4 is much faster than the older Pi's, and can drive 4K screens. A much nicer user experience than the Pi 3B, and the original Pi B I have. The heat sink and fan has a chunky flat plate for the bottom, and a top plate with fins and 2 little fans. The two halves screw together through the mounting holes on the Pi 4. The kit includes the hex tool to tighten the screws The underside of the top heat sink has 4 depressions, that touch chips on the pi 4 board. The kit has an excess of self adhesive heat conducting pads, so there is good heat conductivity. Lacking, are the instructions for assembling the pi and heat sinks. It is fairl...view more