3M Mask filter - (surgical mask) update@10th April
thingiverse
Updated on 10th April, 2020 This is not a replacement or an improvement over any medical protection gear in any way. The effectiveness of this design has not been verified by any authority. This design should be used as a last resort when surgical masks are running low. Add a small piece of filter (cut from the surgical mask) to the exhale area. Use it at your own risk. The latest version is V4_large, which allows for 50% more airflow to ease breathing through the filter. This is a 3D-printed filter designed to be used with the 3M respirator mask specifically the 6000 and 7500 series. The idea is to split a regular mask into multiple pieces, reducing consumption while still providing necessary protection.
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