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>N-95 masks can be with or without valves. I didn't say they necessarily have valves, but all the ones I've seen do. I had one intended for painting, gave it t
by perl4ever 6y ago
>N-95 masks can be with or without valves.
I didn't say they necessarily have valves, but all the ones I've seen do. I had one intended for painting, gave it to a local hospital.