Product: 12 PCS PM2.5 Activated Carbon Face Mask Filter for Adults, Replaceable Mouth Respirator Filter to Anti Haze Dustproof Air Pollution Germ
Brand: Sanfiland
Features:   Every 2 pieces in a small bag for easy use.  Five Layer Filtration technology keep away from  a range of airborne contaminants   All the filters have been professionally tested 
 Measurement of Adult's Mask Filter:   size: 4.7inch * 3.1 inch 
 Specifications: 
 Type: Mask filter for adult. Material:  Activated Carbon,  non-woven melt-blown fabrics. Size: As picture shows. See the size chart on the fourth picture. Color: White. Gross Weight: 0.05 oz. Packing size: 6.7 inch * 7.1inch * 0.4inch.    Maintenance instruction:  Disposable supplies can not be washed or reused.  1 piece of filter is generally used for 3-7 days.
Every 2 pieces in a small bag for easy use. All the filters have been professionally tested and are qualified products .
5 Layer Filtration technology: filters are Made of activated carbon and non-woven melt-blown filter cloth, five-layer filter system effectively keep away from a range of airborne contaminants, Dust, Haze, Allergies,Smoke,Pollution,Ash, Pollen,hazardous chemicals, heavy metal particles etc.
Size of Adults Mask Filter: 4.7''x3.1''. Suit for adults mouth mask insided with fliter slot.
How to use:Insert the PM2.5 filter along the inside of the mask and use it, Refer to Fifth picture.
Disposable supplies can't be reused or washed. Recommend replace filter once a week for the best effect or 3 day If there is serious contamination.

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