We designed the 3M Under Sink Reverse Osmosis Replacement Module 3MROM413 as a multi-layered membrane for the NSF certified 3MRO301, 3MRO401 and 3MRO501 reverse osmosis systems. Our membrane reduces: Arsenic, Barium, Cadmium, Chromium (Hexavalent & Trivalent), Copper, Cyst, Fluoride, Radium, Selenium, TDS and Turbidity. The module is easily changed via our SQC (Sanitary Quick Change) design.