Whirlpool WHER18 Compatible RO Membrane TW30-1810-50<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits Whirlpool WHER18 and UltraFilter 350， 450， 500， and 550 RO systems</li><li>Reduces total dissolved solids (TDS) and organic matter</li><li>Replace prefilters regularly to prolong membrane life up to 2 years.</li><li>Comparable to many other membranes by brands like Whirlpool， EcoWater， Sears， and Kenmore.</li><li>Fits Whirlpool WHER18 and UltraFilter RO systems</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31Jqg2ry0gL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31PrJdiJiUL.jpg" noproxy>