The duo is designed for all the airflow you need thanks to the mesh front panel and the large cavity to arm lots of case fans with the mid-tower MS31 capable of equipping up to 11 fans or a 420mm AIO CPU cooler in the front while the mini-tower MS21 does so at 8 fans and 360mm.
Both of them have magnetic dust filters on the top and front panels as well for easy removal during servicing while the same magnetic properties is given to the side-opening panel for quick access during building or upgrading too.
Front I/O wise, there are two USB 3.0 Type-A and one USB 3.2 Type C for easy external storage connection. Additionally, a GPU support bracket is included for those who are planning to rock some of the top-tier offerings which more than often are large and heavy.
