K5 replacement rough cartridge made of polypropylene. It removes dirt and other particles of mechanical impurities from water down to 5 microns. The K2 cartridge is a carbon block with AQUALEN microfiber that retains particles down to 3 microns. The 2 in 1 water conditioning module is designed to correct the acidity (pH) of the water and enrich it with useful minerals, which improves its taste and optimizes the salt balance. Features and equipment: All specifications - 6 Reduces scale: Without scale Optimizes the composition of minerals: Yes Removes bacteria: Yes Removes chlorine: Yes Removes sand, silt and rust: Yes Removes viruses: Yes