Berkey Portable Water Filtration Systems with BB9 and PF-2 Flouride Filters and Homesmart 25oz Water Bottle ((3.25 gal) Royal Berkey) This Bundle includes the system along with 2 Black Berkey Filters, 2 PF-2 Filters, and a 25oz Homesmart Water bottle. The benefit of this bundle is that the PF2 filters are 50% off of MSRP. PF2 filters out Fluoride, Arsenic V and pre-oxidized Arsenic III, as well as other residual heavy metal ions. You simply screw the PF-2 Fluoride filter into the Black Berkey filters. (Filter Life: Up to 3,000 gallons per filter element) The Filters are both Cleanable, and Self-Sterilizing The System itself is constructed of the Highest Grade 304 Stainless Steel