Krystal Pure Replacement Filters KR15 Reverse Osmosis System Krystal Pure Replacement Filter KR15 and Especial Cosas Microfiber Towel bundle KR15 filter for reverse osmosis system; designed to fit all standard 10" bowls Filters include: 1 carbon filter - 1/2 micron, and 2 carbon post filters - 10 micron This filter reduces particulates down to 1/2 micron One blue Especial Cosas microfiber towel for cleaning up around your system while you change the filters