AXEON MIR–Series Mixed Bed DI Cartridges utilize our 2.5" or 4.0" diameter configurations that fit most standard size reverse osmosis membrane housings. AXEON MIR– Series Mixed Bed DI Cartridges feature a Gel Poly Styrene Cross-linked with DVB mixed bed resin. The DI resin used in these cartridges has been specifically developed to reduce total dissolved solids, including calcium and magnesium carbonate. AXEON MIR–Series Mixed Bed DI Cartridges provide a solution for a variety of applications that need the removal of ionic contaminants. These cartridges act as excellent post-treatment for reverse osmosis systems as well as being effective for applications in the pharmaceutical, semiconductor, medical and industrial fields. Benefits: Fits Standard 4 x 40" Reverse Osmosis Membrane Housings High Capacity Flow Rates High Quality Anion and Cation Mixed DI Resins