Size: Available in inner diameters of 110 mm , this filter caters to various installation requirements, making sure a snug fit for your specific ducting needs. Effective Filtration: The duct air filter is designed with a HEPA net that captures fine particles, making sure that dust, catkins, and insects are effectively removed from the air, promoting a healthier indoor environment. Maintenance Reminder: With high-efficiency HEPA filters typically requiring replacement every 3 to 6 months, this product helps maintain optimal performance and air quality with minimal upkeep. Versatile Compatibility: This filter is compatible with various piping systems including PVC pipes, PE pipes, and aluminum foil tubes, making it a flexible solution for different ventilation setups. Enhanced Airflow: Designed to minimize resistance while filtering, this inline ducting box allows for efficient airflow, making sure that your ventilation system operates smoothly without compromising on air quality.