Replacement Bosch 644845 9000194412 ultra-clean refrigerator water filter, 1/2/3/4 pack *When you buy Cunos Bosch 644845 400 gallon capacity OEM water purifier, you will get clean, delicious water and ice. * The Bosch high-quality water filter produced by Cuno means that you have acquired the expertise of a world leader in liquid filtration with a history of more than 90 years. Using this filter, you can ensure that you get high-quality water for your home or business, which does not contain harmful contaminants such as chlorine, dust, rust and other particles, as well as unpleasant smells and tastes. *The material of Bosch 644845 made with Cuno water filter is top quality, which can ensure a longer product life and at the same time filter out most of the impurities, which will bring strange smell and taste to the water. *This water filter will also extend the life of the refrigerator. It is designed to reduce deposits in refrigerator ice machines. The filtration process of the water filter treatment involves water entering from the outer surface until the water enters the middle of the filter element. As the water passes through each filter layer, the pores of the filter become smaller, and even the finest particles or impurities in the water can be removed. It does not remove minerals that may be beneficial to health, such as fluoride. The replacement interval of these filters depends on your water quality and the water consumption of the entire family. *644845 is an alternative filter for the following refrigerators: Bosch: KAD62 series, Siemens: KA62 series, Neff: K5930 and K5920 series. *CUNO Inc. is a 3M company, the original equipment manufacturer (OEM) of BOSCH water filters. They are a world leader in the design, manufacture and sale of filtration products used to separate, clarify and purify fluids and gases. Its proprietary products are widely used in the global medical, industrial and water markets to enable customers to achieve greater success.