4" (100mm) GRAVITY WALL GRILLE - BLACK. 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 White Wall Grille with Gravity Shutters for 100mm Duct
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
