[Good compatibility] Waterdrop combines precision measurement technology to reproduce the original scale parameters with advanced industrial automation equipment. We aim to produce good fit refrigerator filters with an exquisite engineering design.[Premium filter material] Compared to charcoal, which contains coal, wood, walnut shell, and apricot shell, Waterdrop uses coconut shell carbon block from Sri Lanka. It contains a larger surface area and more micropores. Thus, the filter cartridge can remove chlorine, turbidity, taste and odor, rust and sediment. Asides, we have selected a BPA-free and food-grade filter housing that passed NSF 372 certification for being lead-free.[Fresh-tasting water] The natural coconut shell carbon block can adsorb more impurities. The Waterdrop refrigerator filter improves the taste of drinking water to bring you a unique experience.[Monthly install stickers] Our complimentary set of monthly install stickers allows you to keep track of the filter’s lifespan. The filter life is 6 months or 300 gallons, which will vary based on the water conditions.This filter effectively reduces 29 substances, including various contaminants and impurities, while maintaining beneficial minerals ensuring a fast water flow with no leaks.