ProPur ProOne G2.0 9" All-In-One Water & Fluoride Filter Elements (Set of 2) Removes harmful bacteria and chemical residues from water Tested in accordance with NSF 42 and 53 standards, and NSF protocol P231 All in one filter removes fluoride from water without bulky post filters Filters approx. 2,400 gals, ideal for Berkey replacement Filter water from just about any source: pond, pool, lake, stream, rainwater