Dystopian Mask Filter for Montana Mask

This is a custom filter body I made for the Rowan.edu mask, however I suspect the Rowan.edu mask is just a Montana Mask, so I'm pretty sure this will fit the montana mask. Also included are little elastic tension clips, or whatever you those things.

There are two versions included, one with a hole for a screw with a 7mm diameter head, and one without a hole but a fake screw in its place.