?H13 4-Stage Filtration True Hepa Filter , 2-Pack | | ?Fully Compatible With Odorstop Osap4 Osap5 Osap5Fil Air Purifiers | | ?H13 True Hepa Capture 99.97% Of Airborne Dusts Pm2.5 Down To 0.3 Microns In Size. Remove Large And Airborne Particles, Including Dust, Common Pollutants ,Activated Carbon Reduce Chemicals Vocs, Tobacco Smoke, Pm2.5,Common Household Bad Smell | | ?Please Replace Regularly To Keep Your Machine Fresh And Clean,For Best Results, Remove The Filter Once A Month And Clean With A Soft Brush Or Gently Vacuum. | | ?Top-Notch Quality Used For Maximum