This Pi was used in a cluster experiment and has limited run time. All components are tested and in good working order.

The sturdy construction of the Armor Case makes a rugged Pi package that is very portable and easy to fit in a tight spot. 

The case is the Pi 4 Armor Aluminum Alloy Passive Cooling Case from Geekworm. In my testing, this cooling system maintained 60C or lower temperature under maximum CPU usage for periods of 15 minutes or longer. Running the same tests on the GeekPi Low-Profile CPU Cooler with RGB Cooling Fan maintained as temperature about 3C cooler but it is about 1 inch taler. Either of the these cooling systems will keep the Pi well below the throttling temperature of 80C.