The Sentinel Vortex300 Magnetic Filter is a high-quality and durable filtration solution for central heating systems. With a thickness of 22mm, this rectangular filter is specifically designed for the Vortex300 model, offering reliable filtration with its magnetic feature. The filter is made of durable cardboard material in a brown colour, and comes with a manufacturer warranty of 10 years, ensuring long-lasting performance and peace of mind. With its 22mm valves, this filter provides efficient filtration to keep your heating system running smoothly.