1. [Authoritative certification] The filter has been certified twice by NSF] IAPMO. It does not contain NSF [42 and 372 lead-free, filters 99% chlorine, has smell, and significantly improves the taste of water. It has also passed the certification of European T-V, ROHS, REACH, BPA free and Australian water standards. Only products with relevant certification are selected for your loved ones. 2. [Compatible filter element for Saeco] Gaggia coffee machine and espresso machine are equipped with Aqua Clean filter elements CA6707/10, CA6903/00, CA6903/01, CA69003/99, CA6909-00, CA6803-01, CA6603-99 and CA6803. You can use CTRL eF Enter the model to find to check the exact matching model. 3. [Innovative multi-layer filtering integrated form technology] This multi-layer technology provides different filtering efficiency when filtering various impurities. The inner layer of 0.5 m is effective for 99.99% of cysts, and meets the special reduction standard of Grade I. This filter contains useful minerals in water that are beneficial to health. 4. [High quality filter material] Food grade, no resin, no sodium, reduces scale deposition, softens water, and is healthy.