Round type 26 carbon filter (sold individually) for ARTHUR MARTIN / BAUKNECHT / IGNIS / SCHOLTES / WHIRLPOOL extractor hoods Diameter: 270mm Thickness: 35mm Sold individually Made from high-quality AB90 carbon, its absorption power is twice that of the standard carbon quality frequently used in the market. As they have been given an anti-bacterial treatment, they are recommended for people who have breathing problems. This filter is equipped with a saturation indicator which changes colour when the filter needs replacing.