3M respirator/mask intake valve (6200, 6500, 7500 series)

thingiverse

Print this design with flexible material like TPU, TPE, or Ninjaflex using a 0.2mm resolution. Use a slow print speed when printing with a bowden type 3D printer such as the Ender-3 or Anycubic i3. The provided STP file is also available for further remixing. When printing this design, avoid using the concentric pattern on the top and bottom layers. This will prevent tiny holes from forming on the valve surface.