40mm Nato to 22mm adapter
prusaprinters
<p>Quick modification of <a href="https://www.thingiverse.com/thing:4812621">ThatDrewLion's</a> great model over on Thingiverse. Not intended for for any kind of personal protection - you could throw certain filters on it, but it's not necessarily airtight. For most applications, you'll probably want the “Outer” variant, which is sized to fit 22mm connections inside.</p>
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