This 100mm 4 inch diameter plastic external fixed blade vent cover grille is a white colour, perfect for adding a sleek and modern touch to your home. The inline type design and durable plastic material make it a practical and efficient choice for improving air quality and circulation. Additionally, the size of 155x155mm ensures it is versatile enough to fit various extractor fan applications. Perfect for DIY enthusiasts looking to enhance their heating, cooling, and air systems.