POLYPIPE G425BK High-Quality 4 Inch Round Ducting Pipe Fixed Grill Black\r\n- The grille has a minimum free area.- It has a male spigot for connecting inside the 100mm round ducting.- The louvers are designed to prevent water ingress.- Suitable for external and internal mounting.- Fixed grille vent outlet suitable for 4" round duct pipe.\r\nThe POLYPIPE G425BK High-Quality 4 Inch Round Ducting Pipe Fixed Grill Black is a Fixed grille vent outlet suitable for 4" round duct pipe. Bathroom, toilet, and utility room application. Virtually eliminates air leakage and minimizes the pressure drop associated with ducting systems. The range includes ducting, inlets, and outlets; designed to help customers achieve the highest possible efficiency from Silavent ventilation appliances.\r\nFeatures:\r\n- Bathroom, toilet, and utility room application.- Suitable for external and internal mounting.- The louvers should be installed pointing downwards.- The range includes ducting.- It has a male spigot.- Manufacturer: Polypipe.- Condition: New.- Color: Black.- Size: 4" or 100mm.- Type: Wall Grille.