Brita 100224 Maxtra Water Filter Cartridge comes with the unique Maxtra 4 step filtration has +20 percent improved limescale reduction compared to the Brita classic cartridge. In addition to that, it reduces other substances such as chlorine, which affect the taste and odour in your tap water, reduces certain heavy metals (like copper and lead) along with certain pesticides. Organic impurities are also reduced. The result is cleaner, clearer water for great tasting hot and cold drinks, delicious food and less limescale build up in your domestic appliances. This comes in 2 piece pack. Impairs taste in your drinking water quickly and easily.