Raspberry Pi 4 Aluminium Alloy Case With Cooling Heatsink
The heat sink case is very compact, and well made. It keeps the SoC easily cool enough for normal use, but I have not yet run my PI4 to high CPU usage to check that aspect. Installation is easy with only one caution - the flexible thermal pads used to connect the board components to the raised pads of the heat sink are neither easy to remove from their protection, nor physically robust. Take care, take it slowly and remove the white side carefully. The clear side is easier to remove.
John Paterson