<p><strong>Breathing healthier air</strong> will have a great impact on your health, so make sure you buy the best quality HEPA filters manufactured by Altec Filters with advanced technology. Our advanced filtration technology assures the maximum and optimum quality air.<p/> <p><strong>This package includes</strong> 2 premium HEPA filters and 8 premium activated carbon pre-filters cut to size, the HEPA filter should be changed every approx. every 6 months, and the pre-filters every 1-2 months depending on the amount of usage and environment. Installation is a breeze just open the air purifier and replace them.<p/> <p><strong>These filters</strong> are your perfect choice to replace your HEPA filters plus pre-filters for air purifer Models AC4300BPTCA, AC4900CA, AC4825, AC4850PT, FLT4825 Filter B, AP2200CA and BXAP148. The HEPA filter measures 15.75” x 4.72” x 1.1” pre filter measures 15.75” x 4.72” x 0.2”. Do not immerse or wash the filters or the pre-filters in water.<p/> <p><strong>100% Guarantee</strong> we are confident you will love our high quality product. We offer 90 day money back guarantee, no questions asked and friendly customer service.<p/> <p> <strong>Compare to</strong> FLT4825 Filter B. This product was manufactured by Altec Filters and is not a OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model is solely made for the purposes of compatibility.<p/>