Berkey PF-2 Fluoride Filter (Set of 2) - Fits Black Berkey Purifiers Only<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The PF-2 is for use with Black Berkey Purifiers - If you use ceramic filters， you will need the PF-4</li><li>Primarily Filters Fluoride and Arsenic</li><li>Attaches to the bottom of a Black Berkey Purifier - Used as a Post-Filter</li><li>For use with Big Berkey， Travel Berkey， Berkey Light， Royal Berkey， Imperial Berkey， Crown Berkey</li></ul></div><img src="http://ecx.images-amazon.com/images/I/413wLGub37L.jpg" noproxy>