3M bayonet filter cartridge

thingiverse

I had a long-standing obligation to repay the community: I created a halotherapy mask two years ago and used a 3M mask as a base, necessitating the purchase of original filter cartridges. The instructions can be found here: https://www.instructables.com/id/Halotherapy-Mask/ However, giving up a brand new filter cartridge is a waste. To put it succinctly, the COVID-19 pandemic arrived and I ran out of paper masks, so I had to craft a 3M bayonet-compatible custom filter. I've already tested it, and four layers of industrial filters fit perfectly. Approximately four hours of print time per cartridge were required. Oh, and you can replace the filter and disinfect the case since it's reusable! You don't need to glue the parts together; simply sandpaper the edge until it fits snugly! I'm grateful to 7eggert for providing the fitting, which works flawlessly.