The Worcester Greenstar Magnetic System Filter 28mm 7733600237 is a high-quality product from the reputable brand Worcester. This filter is designed to effectively remove any magnetic particles from the heating system, ensuring optimal performance and longevity. With a 28mm diameter, it is compatible with a range of Worcester boiler models, providing a reliable solution for maintaining the efficiency of your heating system. Ideal for those looking to keep their heating system in top condition, this magnetic system filter is a reliable and efficient choice.