Gas Mask Filter V2

**3D printable gas mask filter designed for 40mm NATO threads!**
-Designed to accept any filter medium available up to 1" (25.4mm) thick.
-Requires one 2.5" (63.5mm) long, 1/4x20 (M6x1) hex head bolt, stainless steel recommended.
-9.425² inches of breathable surface area.
-.STP files included for my fellow creatives out there.
-Modeled in English, scale up by 2540% if .stl appears tiny in slicer.

V2 upgraded features:
-130.5% increase in breathable surface area for maximum airflow through filter and easier breathability.
-No supports needed for printing (45° overhang max)
-Printable nut designed for ease of assembly and will protect the filter from punctures
-can now accept filters up to 1" thick

Original version: https://www.thingiverse.com/thing:3711379

Warning! This is not an OSHA approved respirator design, please exercise caution. I am not liable for how you choose to use this model.