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  Product Name       FACEMASK Product Brand       FIL TECH Mode               FIL TECH F852 Standard            GB2626-2006 Classification        KN95 Filtering Efficiency     ≥ 95% Certificate           GB Intended use         For use in particles prevention ； non medical use. Source:   https://www.unisourcesgroup.com/a/Facemask/KN95/5.html

    Product Name       FACEMASK Product Brand       FIL TECH Mode               FIL TECH F 851 Standard            GB2626-2006 Classification        KN95 Filtering Efficiency     ≥ 95% Certificate           GB Intended use         For use in particles prevention ； non medical use. Source: https://www.unisourcesgroup.com/a/Facemask/KN95/3.html

Product Name       FACEMASK Product Brand       FIL TECH Mode               FIL TECH F 850V Standard            GB2626-2019 Classification        KN95 Filtering Efficiency     ≥ 95% Certificate           GB Intended use         For use in particles prevention ； non medical use. Source: https://www.unisourcesgroup.com/a/Facemask/KN95/3.html

    Product Name        FACEMASK Product Brand        FIL TECH Mode                FIL TECH F 850 Standard            GB2626-2006 Classification        KN95 Filtering Efficiency     ≥ 95% Certificate           GB Intended use         For use in particles prevention ； non medical use. S ource: https://www.unisourcesgroup.com/a/Facemask/KN95/1.html

  1.Confirm the top and bottom. 2.Stretch the mask. 3.Close to the face ， wear the ear hanger ， pullback the mask to completely cover   the nose and chin. 4.Press the flexible metal nose   piece to fit snugly around the nose. S ource: https://www.unisourcesgroup.com/a/Facemask/KN95/7.html

  1.Confirm the top and bottom. 2.Stretch the mask. 3.Close to the face ， wear the ear hanger ， pullback the mask to completely cover the nose and chin. 4.Press the flexible metal nosepiece to fit snugly around the nose. S ource: https://www.unisourcesgroup.com/a/Facemask/KN95/6.html