💧【NSF TESTED AND CERTIFIED】Our filters are tested and certified by NSF international against NSF/ANSI Standard 42. 💧【PREMIUM CARBON BLOCK】 The carbon block used in our filters is made of pure coconut shell carbon in a “block” construction, the structural design of which offers a high contaminant-absorption rate. 💧【EXCELLENT FILTRATION PERFORMANCE】The advanced filtration technology reduces chlorine, odor and taste, organic chemicals, suspended particles, as well as other potentially harmful water contaminants. All you get is clean and healthy water! 💧【SATISFACTORY CAPACITY】Enjoy better drinking water for up to 750 gallons or 2,839 litres. Replace your filter every 6 months for optimum performance.