3M adaptor for secura filters

thingiverse

Easy to print. This design allows the use of a secure 3M mask. It prints into two parts, which fit tightly together and can be glued in place. The secura side requires a 2mm thick seal, which can be printed with rubber using a "cutter" file, or cut out with a laser from a sheet of silicone or rubber using an SVG file. Alternatively, it can be cut out with a knife from a sheet of silicone or rubber, by printing the "cutter" file and using it as a guide or stencil. The quality of the edges is not critical, as the sealing grooves are located in the middle between the inner and outer edge of the seal. These filters are easily available online. If needed, an adaptor can be tossed to your doctor.