Fliters Size: Flters size measures approx. 12.5 x 8 cm/ 4.9 x 3.1 inches, compatible with most dust masks, easy to insert or replace the original one with no problem
No more worrying about masks being inadequat, This breathing insert protective mouth mask filter allows your mask to be reused without worrying about no mask, saving time and money, and very environmentally friendly
Disposable Face Mask Gasket: One time use; Keep the inside of the mask clean; Extend the use time of mask; Breathable comfort
Widely Use:In the hospitals, restaurants, beauty salons, nail shops, pet shops Gray sky, fog weather and cleaning as well as other environments that require respiratory protection for dust, dentist, salon, general maintenance, etc
Note: Suggest replace the fliters every day of uses for the best effect.