The 3M High Flow HFR Series Filter Cartridge is a high-performance, long-lasting and cost-effective filter option that offers absolute-rated particle retention and fits into existing Pall Ultipleat High Flow Housings. Our filter media and its pleating set us apart. The 3M lofted microfiber filtration media, composed of non-woven layers that run coarser to finer in the direction of flow, improves capacity and filter life. Our Advanced Pleat Technology (APT) design maximizes the usable filtration surface area and helps limit blinding effect on the filter media, resulting in longer filter life.