Compatible with: Extractor hood filter for Bosch, Siemens, Neff, Gaggenau and Construct, e.g. Siemens HZ9VRCR0 17004796, Bosch HEZ9VRCR0 17004805, Neff Z821VR0 17004806, Gaggenau CA282111 and Constructa CZ9VRCR0 17006669. Comp Please see the picture for suitable models. Functionality: The activated carbon filter can filter the air very efficiently, neutralize the odor caused by cooking and thus ensure fresh air in the kitchen. Recommendations: The circulating air replacement filter is a one-time consumable item, we recommend replacing it every 6-12 months depending on your cooking habits. Product size: The size of the active carbon filter is 193 x 75 x 35 mm and is easy to install. Box contents: 4 pieces replacement filters.