Pre Sediment Filter Cartridge for RO system， under sink and whole house system - 6 Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Spun polypropylene for resistance to chemicals and bacteria</li><li>Reduces sand， silt， scale， and rust particles in residential， commercial， and municipal drinking water</li><li>Combines two separate gradient layers for higher efficiency and dirt-loading capacity</li><li>Nominal filtration rating of 5 microns</li><li>Pre-filter for Under-Counter， UV and Reverse Osmosis systems</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21kfmV5Pu-L.jpg" noproxy>