(20Pcs Exhaust Air Valve Grille Cone Filter Fit for Zehnder Helios Maico Pluggit DN 125 G4. Compatible With: fit for Zehnder Helios Maico Pluggit DN 125 G4. Item included: 20Pcs Filter. 5) Suitable for exhaust valves/butterfly valves, conical filters for bathroom or guest toilet ventilation systems.
