3M 6700 6800 Full Face Mask Respirator Exhaust Valve Filter

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3M 6700/6800 Full Face Mask Respirator Exhaust Valve Filter This design is compatible with the 3M 6700/6800 Full Face Mask Respirator. The 3M Full Face Mask Respirator does not have a built in filter for the exhaust port and can be dangerous because your are exhaling unfiltered air from your 3M Full Face Mask Respirator. Made specially for health care workers, this design allows you to fit a cut out of a normal face mask and place it inside the respirator. Use a circular cut of from a face mask then screw the 2 pieces together. No need for additional clip-on fliters outside that only adds to the bulk of the mask. This filter stays hidden inside your respirator. UPDATE 8/3/2020 Added Version 3 of the model. Wider area for filtering exhaled air. Smoother screw system. No support printing. Disclaimer This design does not intend to replace official products meant for filtering exhaust valves. Use at your own discretion. Print only for your personal use. Sale of printed design is prohibited and under copyright. Contact me if you plan to sell prints of my design.