Dow Filmtec TW30-1812-100 Reverse Osmosis Membrane<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Rated at 50 psi and purifies about 20% more water than elements rated at 60 psi</li><li>Shipped dry for convenient and a long shelf life</li><li>Free Chlorine Tolerance:</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31Yj99fnuVL.jpg" noproxy>