Nispira True HEPA Activated Carbon Filter Compatible with Air Purifier MA25R, MA#25 Item Package Quantity:2 97 percent of airborne particles

97 percent of airborne particles as small as 0

but the filter will still install and function normally

Keep your Winix A230 or A231 air purifier performing at its best with the Nispira Filter O True HEPA + activated carbon pre-filter replacement set — a direct-fit alternative to the original manufacturer filter

replace the filter approximately every 12 months

Nispira True HEPA Activated Carbon Filter Compatible with Air Purifier MA25R, MA#25 Item Package Quantity:2 97 percent of airborne particlesNispira 3 in 1 premium True HEPA with activated carbon replacement filter compatible with MA#25 air purifier Compared to original part MA#25R Preliminary filter traps large particles such as hair, dust. True HEPA captures up to 99. 97% of particles, as small as 0. 3 microns. Activated Carbon filter removes any unfavorable household odors from kitchen, wildfire smoke and any harmful VOCs Suggest to replace both filters every 6 months to optimize