BRAND NEW SEALED IN BOX Filters out flouride and arsenic from water - regular (genuine) Bwrkey/British Berkefeld filters do not. Pair of add-on water filter cartridges for use with british berkefeld gravity water filters. These add on (screw on) to the underside of your British berkefeld filters and are specifically designed to filter out flouride, arsenic and other extremely small particles that regular berkefeld filters let though. get your water extra pure with these filter add on cartridges. This is for a pair of brand new boxed filters.
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