PARTU BS-08 HEPA Air Filter, 3-in-1 Filtration System, Activated Carbon Filter. Condition is «New». Features with True HEPA &Active Carbon Filters: it removes 99.97% of allergies, dust, pollen, smoke, pet dander; filters particles as small as 0.3 microns and larger and filters air pollution of PM 2.5. The filter should be replaced every 6 months to maintain the best results. Shipped with USPS Priority Mail.