4" (100mm) WHITE GRAVITY WALL GRILLE. The main size usually refers to the fan (blade) sizes. Experience the Difference.
Extractor Fan Vent Cover White Wall Grille with Gravity Shutters for 100-125-150
Extractor Fan Vent Cover Wall Grille Gravity Shutter for 150mm Ducting Brown
Extractor Fan Vent Cover Wall Grille Gravity Shutter for 150mm Ducting - White
Extractor Fan Vent Cover Grey Wall Grille with Gravity Shutters 100mm | Manrose
Extractor Fan Vent Cover Brown Wall Grille with Gravity Shutters for 100mm Duct
