Kair Terracotta Gravity Grille with Rectangular 110x54mm Rear Spigot

110mm x 54mm rectangular spigot on the back of the grille fits inside the Kair 110mm x 54mm Rectangular Duct Pipe (Part: DUCVKC249). Stops unpleasant odours, noises, or draughts flowing back through your duct. Non-return shutter flaps close automatically when not in use. Easy to install, just push-fit duct and fittings together. Gravity flap - no need for springs that break. Built to last out of high-quality plastic materials., Manufacturer: Kair