About This [High-efficiency Filtration] :Replacement for PF-2 fluoride filters effectively reduce fluoride and arsenic, absorb odor, color, residual chlorine, heavy metals, they also reduce sediments and large particles effective in improving taste [Fluoride and Arsenic Filter]:The white fluoride filter for pf-2 replacement is made of natural mineral synthesis material Carbonate Apatite as the filter medium. Efficient absorption of 99% residual chlorine and fluoride [Compatible with Berkey]: Replacement for pf-2 fluoride and arsenic filter, compatible with Big, Travel, Royal, Imperial, Crown, Light series gravity filtration system, has the same powerful purification capacity as the original brand [Durable Life Span]: For best performance, replace the white fluoride filter every 1,000 gallons based on water conditions. Note that TDS levels do not fully indicate water quality and our filters do not reduce TDS values! Virego - Risk free shopping brand, one of the most trustworthy brands on Amazon. Your issues will be resolved within 12 hours - Any problems with the product can be directly refunded in full or a new one Overview Material : Replacement for PF-2 Fluoride Filters Product Dimensions : 6.53'D x 5.7'W x 2.8'H Item Weight : 0.98 Pounds External Testing Certification : NSF Product Benefits : Reduces Chlorine