About this item

• The replacement valve for BASE CAMP M Plus, Upgrade M Plus, M Cross and N Plus Dust Face Mask. This combo kit contains a cap of exhalation valve, a base of exhalation valve, four diaphragms
• Ideal anti dust filters face cover making accessories, great mask filter valve. One-way valves offer an improved flow rate white you exhale air,helping to eliminate mois-lure from your face and mask. Air is allowed to flow out only,not allowed to enter
• One-Way Valves: When you exhale the valves open, so that air from your lungs goes into the mask and exits directly through the valves, instead of being forced back through the filter. This makes it easier to exhale
• REUSABLE & UNIVERSAL: The activated carbon filter is replaceable and the mesh mask shell and valves are washable and reusable; Ideal for woodworking, mowing, painting, construction, cleaning, running, cycling, etc
• An easy twist seal locks the inner filter in place and blocks unfiltered air. This safety dust mask valve is convenient and easy to exchange