10pcs Protective Mouth Filter Dust Cover Filter Paper Activated Carbon Cover Filter Pads with 4 Exhaust Valves

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10pcs Protective Mouth Filter Dust Mask Filter Paper Activated Carbon Mask Filter Pads with 4 Exhaust ValvesDescription:Material: Activated carbon + breathable fiber clothQuantity: 10pcsPackage includes:Mask filter * 10Air valve * 4