Ecosoft 5 Stage Reverse Osmosis Water Filter Cartridge Replacement for Membrane (Stages 4-5) ENJOY 1 YEAR OF FULLY PURIFIED WATER OR MONEY BACK!  Our elite 5-stage under sink water filter replacement is going to maintain and prolong the beneficial effects of the Ecosoft 5-stage reverse osmosis water purification system! Make sure that you and your family continue to enjoy crystal clear and healthy water! US MADE ADVANCED PURIFICATION TECHNOLOGY  We incorporate the US made Dow Filmtec membrane to efficiently optimize your drinking and cooking water. The unique 5-stage design and the activated carbon filter will ensure superior quality filtration! EXTREME AND THOROUGH QUALITY CONTROL  This premium filter replacement set contains the 4th stage Dow Filmtec reverse osmosis membrane that removes up to 99.8% of water contaminants and the 5th stage coconut shell activated carbon filter that optimizes taste and removes odours! ANYONE CAN INSTALL IT  Simple installation, no need for plumber! 100% MOUNTAIN-SPRING WATER OR YOUR MONEY BACK  We, at Ecosoft, believe that healthy water is the cornerstone of a healthy life. Thats why we confidently back our products with a 30-day money back guarantee, 1-year full warranty and a premium 5-year manufacturers warranty!