KN95 mask - AN HUI XI HUI IMPORT & EXPORT CO., LTD. - page 6.
China KN95 mask catalog of Kn95 Masks Anti-Fog Anti-Poison Dust-Proof Breathable Disposable Face Masks, Cerfiticates with Breathing Valve Meltblown Disposable Protective Mask KN95 provided by China manufacturer - AN HUI XI HUI IMPORT & EXPORT CO., LTD., page6.