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. package comes with 92 OZ Acrylic infuser pitcher 2 Black Berkey water purification elements are included (you can use up to 4)