General description The vhbw conical filter is designed for use in DN125 ventilation systems, effectively preventing contamination in the exhaust air ducts while ensuring quiet operation of exhaust air valves. Technical specifications Filter class: G4 Filter size: DN 125 Diameter: 12.5 cm Length: 18 cm Width: 18 cm Thickness: 0.8 cm Material: synthetic fibre Colour: white Binder-free, thermally bonded Compatibility and accessories Compatible with all round exhaust air disc valves with a mounting ring diameter of 12.5 cm (DN 125) Replacement for part number 990320032 Other information Content of delivery: 20x exhaust air filter (conical filter)