The "Household Product Quality Labeling Act" specifies 13 substances to remove water purifiers. Toclas compatible replacement NSF cartridges effectively remove not only this 13 substances, but also 4 substances established by the Association of Water Filters Association, organic fluorine compounds known as Forever Chemicals, PFOA and PFOS. In addition, it meets NSF International standards for pressure resistance and safety of filtration materials and resins required for water purification cartridges. Compatible models: JC-101, JC-201, JC-301, JC-401, JC-501.