Purenex 3PP-10B 1 Micron Whole House Water Filter Sediment， 10-Inch， Blue， 3-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Melt-Blown Polypropylene 4-layer graded density with a 1 micron nominal filtration rating</li><li>Universal replacement for all 4.5" x 10" Big Blue filter cartridges</li><li>3 filters， individually wrapped</li><li>Removes dust， particles， and rust</li><li>Filter life: 10，000 gallons</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31oTvuKOJHL.jpg" noproxy>