The GFP Premium is a sintered activated carbon block filter cartridge for filtering drinking water. Due to the high activated carbon mass, it has a higher adsorption rate compared to conventional activated carbon filter cartridges. With a pore size of around 0.4 μm, it is bacteria-proof.

The Zenton S4 is an innovative activated carbon cartridge for drinking water filtration. Thanks to a membrane-like adsorption material made of woven activated carbon in combination with a sputtering process, it has a high adsorption rate and at the same time offers more protection against lead and heavy metals and is also virus-proof.