Respirator
thingiverse
You can modify it using SolidWorks 2018 by creating a new part and designing a one-way valve. To do this, first search for "one-way valve" on Google to get an idea of its design. Next, cut out a wheel with a diameter of approximately 14mm using scissors or a cutting tool. Then, insert the valve into the center of the wheel. There are three types of masks based on facial width:
Download Model from thingiverse
With this file you will be able to print Respirator with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Respirator.