Ensure that your wall ventilation is firmly secured with the 4” Wall Vent Installation Kit from Xeplair's fantastic range of bathroom accessories. Wall vents are a great purchase for any home, as they supply fresh air to your home, without the all the noise and buzz that you would get if you were to open the windows. Wall vents also eliminate the risk of heat escaping through open windows in the winter, thus reducing the cost of heating your home. The Xpelair Wall Vent Installation Kit is specially designed to support a cavity or line a solid wall hole and is to be used with 100mm bathroom extractor fans. Within this package, you will receive a wall tube and external grille to make for a quick and easy installation. Please note, that your wall vent is to be installed on the outer wall of your home above or near a window. Features and benefits: Aids in a quick and easy installation for your wall vent Bridge a cavity / line a solid wall hole To be used with 100mm fans only Comes complete with wall tube and external grille