This filter can be used for over a year with regular houshold use, Hepa filters can capture 99, 97% of allergens down to 0, 3 microns in size, Are compatible with FilterStream DirtTamer V2510 and V2400, The vacuum cleaner is kept performing at peak levels when the filter is replaced regularly, This filter has been certified Hepa for true Hepa results, 1 Pack, SKU: FO043