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Nov 21, 2016 · N99 air masks can filter up to 99% of the particulate matter 2.5 from the air. Just like the N95, they dont work well against oil-based pollutants, but are better than the former because of the Disposable Medical Supplies - Shenzhen Ousida China Disposable Medical Supplies catalog of Disposable Nonwoven 3ply Medical Face Mask Made by Machine with Ce FDA ISO, Disposable 3D Fold Dust N95 Face Mask with Valve Non Woven Active Carbon Anti Pollution Respirator provided by China manufacturer - Shenzhen Ousida Disposable Medical Supplies - Shenzhen Ousida China Disposable Medical Supplies catalog of Disposable Nonwoven 3ply Medical Face Mask Made by Machine with Ce FDA ISO, Disposable 3D Fold Dust N95 Face Mask with Valve Non Woven Active Carbon Anti Pollution Respirator provided by China manufacturer - Shenzhen Ousida
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