Jura CLARIS Pro Smart Maxi Filter CartridgeCompatible with Jura X8, and Jura X10 Coffee contains 98 % water. So water of the highest quality is essential to creating the best possible coffee result. CLARIS Pro Smart maxi prevents limescale, prevents chlorine and prevents heavy metals. It features the professional up flow principle and always filters exactly the amount of water required for each preparation. Thanks to I. W. S. (Intelligent Water System) and RFID (radio frequency identification)