Sew on flange for North P100 cartridges, along with a second, top flange for a good seal.
Description
This is a two part assembly for attaching to home made masks. It's threaded for North filter cartridges. If there's enough interest I may redraw for the twist lock cartridges. I also am thinking that rather than sew on, perhaps it would be better with the two flanges threading together, so it can be removed from a mask for cleaning. The downside to this is that the threads on the clamp together may not last, and they may fall apart after not too much use. Feedback is appreciated.
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