Please confirm before purchase : The size of this filter cartridge for a 3.5-liter water filter container is: 25.5 cm x 13.5 cm x 25.5 cm (10.0 x 5.3 x 10.0 inches). Please check if it can be inserted into the refrigerator door.[Excellent Quality]: This filter is "WD-PF-01A Plus", not Brita Maxtra. Due to the use of loaded activated carbon and high-efficiency ACF from Japan in the water tank, you can be confident that you are enjoying the best performance.Certified filtration: This filter element has passed NSF 42 certification and can reduce chlorine, odor, and odor. It has also obtained NSF 372 lead-free material certification. Adopting multi-stage water filtration technology. Drink plenty of water every day.[Risk free Durable Life]: High quality filters can produce over 757 liters of water before replacement is needed. The Waterdrop Chubby water filtration tank can replace over 1600 standard 16 ounce water bottles, saving both money and protecting our environment. Special filtering performance : The main purpose of this water droplet filter is not to remove TDS. TDS "stands for" total dissolved solids ", which includes inorganic salts and small amounts of organic matter. This type of filter can reduce harmful substances while retaining beneficial calcium and magnesium, which are the main components of inorganic salts. The water droplet reverse osmosis system can physically remove TDS.