Filmtec TW30-1812-24 RO Reverse Osmosis Membrane， 1-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Polyamide Thin-Film Composite</li><li>Imported</li><li>98% Stabilized Salt Rejection (Minimum Rejection 96%)</li><li>NSF/ANSI Standard 58 listed</li><li>Membrane Dimensions: 11.75" Overall Length， 1.75" Diameter (Fits Standard 2" ID Membrane Housings)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/315Gq33zcaL.jpg" noproxy>