A 2-pieced filter cassette for the 3M 3200 respirator. Outer piece provides general protection to the filter membrane; Channelled-design of the inner piece to maximise air flow for easier respiration. Each cassette is sized for 1/3 surgical mask (standard adult size) or any filter membrane. Splash-proof outer piece is also avaliable for download. This cassette can save surgical masks at this critical moment.
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