Verplas G400BR High-Quality External Ducting 4 Inch Gravity grilles Brown\r\n- Exterior gravity shutter.- Connects directly to ducting.- Easy to fit.- Connection to ducting.- This grille is intended for use with extractor fans.\r\nThe Verplas G400BR High-Quality External Ducting 4 Inch Gravity grilles Brown that is easy to install, just push-fit duct and fittings together. Perfectly suited bathroom or kitchen extractor fan, hydroponics fan, or in-line extract fan. This grille can be used as a part of a long ductwork run for a variety of purposes including whole-house ventilation, passive ventilation, positive input, air conditioning, and heat recovery systems.\r\nFeatures:\r\n- Outer wall mounting.- Decoration of ventilation shaft vents or for connection to round air ducts.- Equipped with gravity louver shutters for backflow prevention.- Temperature and UV resistant antistatic plastic.- Flush mounted fasteners.- Easy maintenance.- Manufacturer: Polypipe.- Condition: New.- Color: Brown.- Size: 4" or 100mm.- Type: Gravity grilles.