CeraMetix® GF is the most advanced ceramic filter available. 7" Imperial Cerametix Candle, 2.75 inch diameter Ceramic shell carbon core gravity water filter candle filters fluoride, chlorine, chloramines, PFAS, PFOS, Heavy Metals, Lead, Organic Compounds, Pesticides, Bacteria and other contaminants. There is no activated alumina used in this filter. Sana Vida has a capacity for 2 Fluoride filters Cannot be used with the Niagara Vessel Made in the USA >92% Fluoride reduction - All types - Fluorosilicic acid/hydrofluorosilicate, sodium fluorosilicate, and sodium fluoride Silver impregnated to protect the integrity of the ceramic against biofouling to ensure long life. Meets or Exceeds NSF/ANSI Standards 42 & 53 for the following: >99% Chlorine reduction >99% Lead reduction >98% Heavy metals reduction >98% Pesticides & Herbicides reduction >99% Pharmaceutical compounds (ANSI/NSF Standard 401) >99% Microplastics -Additional information found on Sertodo.com