Compatible with extractor hood models from Bosch, Siemens, Neff, Gaggenau, and Constructa, such as Siemens HZ9VRCR0 17004796, Bosch HEZ9VRCR0 17004805, Neff Z821VR0 17004806, Gaggenau CA282111, and Constructa CZ9VRCR0 17006669. Refer to the image for compatible models. Functionality: The activated carbon filter efficiently purifies the air by capturing odors and impurities generated during cooking, helping maintain fresh air in the kitchen. Recommendations: The recirculating air activated carbon filter is a consumable item designed for periodic replacement. It is recommended to replace the filter every 6 to 12 months based on usage frequency and cooking habits. Product size: Each active carbon filter measures 193 x 75 x 35 mm and is designed for easy installation. Box contents: 4 replacement filters. When selecting this product, please verify the dimensions and compatibility to ensure proper fit. Detailed product information, including features and specifications, is provided in the title and description. For any questions regarding the product, feel free to reach out through Amazon’s messaging system. We aim to ensure your complete satisfaction and are committed to providing prompt support.