Air purifier pre-filter: good size compatible with HEPA air purifier, performs well with front line of filtering, filter and absorb odors, particles, dust, pollutants, allergens etc., good product for keeping fresh air and good mood.

Multiple uses: work great for prevent dust, particles, pollutants flying into HEPA filters, so main HEPA filter will last longer; These are easy to replace and do a great job extending the life and improving the efficiency of the HEPA filters; Help your family breathe the cleaner air.

Eco-friendly absorbing material: absorbent and filterable activated carbon, keep the carbon filter changed every 2-3 months, in order to keep good filtering effect, please do not rinse.

Dimensions and suitable model: measures 14.2-inch length, 17.2-inch width, 0.2-inch height, compatible with HPA300 Series air purifiers; Pre-filters are nice pre-cut according to actual size, thicker ones to clean the air nicely.

Package includes: come with 6 pieces of carbon activated pre-filter, enough for substitute, average is 2-3 months between replacements, useful for improve filtering effect.