Model: FS-1-KAS-AG FS-1-KAS-AG Ceramic Water Filter 1. With C-52 Ceramic Cartridge & KDF + Activated Carbon + Silver Activated Carbon + Nano Silver (AG).   Model: FS-2-KAS-AG FS-2-KAS-AG Ceramic Water Filter 1. Tube 1 With D-250 Ceramic Cartridge. 2. Tube 2 With KDF + Activated Carbon + Silver Activated Carbon + Nano Silver(AG).   Model: FS-3 FS-3 Ceramic Water Filter 1. Tube 1 with D-250 0.9 or 5micron ceramic cartridge. 2. Tube 2 with D-250-Resin(cation resin). 3. Tube 3 with D-250-Carbon(KDF & activated carbon & Silver activated carbon).   Model: FS-3-PP FS-3-PP PP & Ceramic Water Filter 1.Tube 1 with D-250-PP 1 or 5micron PP cartridge. 2. Tube 2 with D-250 0.9 or 5micron ceramic cartridge. 3. Tube 3 with D-250- carbon(KDF & activated cartridge & silver activated cartridge).