The Gutter Mate Filter Basket is a patented feature of the Gutter Mate Diverter & Filter. Its purpose is to catch debris, filtering rainwater & preventing expensive blockages from occurring. Order your replacement filter basket. Suitable for use with both Gutter Mate Filter & Diverter Original & Gutter Mate Filter & Diverter 2 (if you're still unsure please Contact Us) The basket can be cleaned by removing it as shown in the product image. Watch our fitting instructions for our Fine Mesh Insert Watch our step-by-step guide on how to set up your Guttermate diverter & filter