If you want to reuse FFP2/KN95 Masks they should ideally dry fore a week before you reuse them. Furthermore they shouldn't be used for a long period of time. That's why there are Clips for two Masks a day times seven (for the seven days in a week).
There are two models. One for three mounting screws and one with only two. Two works great but has a little bit of flex when pulling on a mask. With three screws it doesn't flex but the third screw is right in the middle. If you wand to pint it on the prusa mini the bed isn't big enough for the hole build. Its split in the middle (exactly where the third screw goes). So don't over tighten the screws in that case to not split the model.
For the build you need:
The author hasn't provided the model origin yet.