The Worcester Bosch Greenstar junior CDI ERP Controls Cover Shield 87110003020 is a replacement cover shield designed specifically for the Worcester brand of storage tank water heaters. This shield is essential for maintaining the performance and efficiency of the boiler heating system. Made to fit the Greenstar junior CDI ERP model, this cover shield ensures that the heating system operates effectively and seamlessly. Ideal for DIY enthusiasts or professionals looking to replace a damaged or missing cover shield, this product is a reliable and essential component for any heating system.