Watts Premier 114110 EZ RO4 50 GPD Replacement RO Membrane<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>50-Gallon per day RO membrane for the Watts Premier 531418 EZ RO4 reverse osmosis^Fast filter change out with valve in head engineering and quick twist filter replacement^Sanitary quarter turn filter change^Reduces TDS， sodium， arsenic， lead， percholate， radium， uranium， protozoan cysts and more^The heart of your reverse osmosis system reducing impurities down to 1/10，000 of a micron</li></ul></div><img src="http://ecx.images-amazon.com/images/I/211cYCFXfWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41N8uQu1q5L.jpg" noproxy>