3M Gas mask decorative cover plug
thingiverse
The idea is to use the gas mask for photoshootings, without damaging it. The plug can stay up without even get screwed in and the grid can be customized with any other of your choice: just glue it with instant glue on the 3m plugs. Diameter of the decorative grid must be 3,6 cm. The grid is very thin, please feel free to make it higher. I used Cura and changed the setting of the printed object to resize the object and set it to be 4 mm. high (but same other dimensions).
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