●TRUSTED FILTRATION; includes the Blu Technology 0.2 micron high flow filter - smaller micron size means greater protection; similar RV water filtration system filters on the market have less effective, larger pore sizes at 0.5 micron or larger; Blu Tech filters are trusted by RV manufacturers and come standard on many new RVs from Forest River ●SUPERIOR PROTECTION; the 0.2 micron filter provides superior protection for very small sub-micron particulates commonly associated with well water and city water at campgrounds or your home ? with the power of a whole house water filter replacement cartridge ●HIGH FLOW; Blu tech filters have high flow technology due to uniformly distributed pores, allowing water to travel through with no significant drop in water pressure, similar to a whole house replacement filter; making it the perfect water filter for campers ●COMPATIBLE WITH; the R2/DUO water filter replacement pack is designed to fit the Blu Technology R2, DUO, or other 5 inch, 2-stage filtration system - our filters are designed to be significantly smaller than conventional 10-inch filters used as a house water sediment filter ●UNMATCHED TECHNOLOGY; the 0.2 Micron filters pleated membrane filter cartridge is constructed with high performance polypropylene filter media that is a technological breakthrough for sub-micron level performance; with a 2-4 month filter life and greater performance than a carbon water filter cartridge 10 inch