The Fito Filter K11 Clas Si+ is a replacement filter cartridge designed to provide clean and mineralized drinking water. It utilizes a combination of high-quality activated carbon treated with silver and ion-exchange resin to remove active chlorine, organic substances, and chlorinated organic contaminants while reducing water hardness and eliminating toxic metal ions. The silver treatment helps prevent bacterial growth within the cartridge, ensuring the water remains fresh. What sets this model apart is the patented silicon mineralizer, which adds beneficial silicon to your water and provides additional antibacterial properties. With a filtration capacity of 300 liters, it offers a long-lasting solution for those using Fito Filter or Apă Nouă pitchers, and it is also compatible with older Brita models and Aquaphor A15 (B100-15) pitchers.