CeraMetix® GF is the most advanced ceramic filter available. CeraMetix® GF is the most advanced ceramic filter available. CeraMetix® is our CeraSyl™ DE (diatomaceous earth) ceramic shell with our granular AquaMetix® core inside to offer the reduction of aluminum, arsenic, cadmium, chloramines, chlorine, fluoride, lead, mercury, nickel, radionuclides, tri-halomethane, and zinc in a single, revolutionary ceramic filter element. These CeraMetix® GF elements are for use in gravity filter systems only. Slimline filters are 2" in diameter. System accommodates up to 4 filters at a time. There is no activated alumina used for Fluoride Filtration in this filter. 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. Cleanable for prolonged life 0.5 Micron absolute >99.9% Efficiency at 0.2 micron Meets or Exceeds NSF/ANSI Standards 42 & 53 for the following: >99% Chloramine reduction >99% Chlorine reduction >99% Lead reduction >98% Heavy metals reduction >98% THM's (Trihalomethanes) reduction >98% VOC reduction >98% Glyphosate reduction >98% Pesticides & Herbicides reduction >99% Pharmaceutical compounds (ANSI/NSF Standard 401) >99% Fluorinated Organic Acids (PFOA & PFOS) >99% Microplastics >95% Per and Polyfluoroalkyl substances (PFAS) >94% Radionuclides reduction >92% Nitrates reduction Filters should be replaced annually Capacity 7" filter- 700 Gallons MADE in the USA!