The Spear&Jackson BoilerMag Duel Flow System Filter is designed to maximises collection performance.An unrivalled magnetic surface area coupled with the fact that water flows through the magnetic field twice-ensures almost 100% of debris is removed on the "first pass" through the Filter. Manufactured by Boilermag, this filter is designed specifically for boiler heating systems. With a GTIN of 5012095081203, this product ensures a steady supply of hot water while maintaining the cleanliness of your system. Easy to install and adjust, the BoilerMag Duel Flow System Filter is a reliable choice for maintaining a warm and comfortable home.