Klober Rainwater Outlet Leaf Filters are designed to be shatter proof and ensure there are no blockages in the drainage system due to leaves and other debris, as well as still allowing the water to drain effectively. The Rainwater Outlet Leaf Filters are made of high impact PVC which are more than a match for snow, ice and rain. The ultimate test for materials is frost, however due to their durability they remain flexible and are unaffected by these extreme temperatures, as well as physical punishment. This Klober Rainwater Outlet Leaf Filter 100mm is an accessory to the Klober Rainwater Outlets - Single-Piece 100mm, and is easy to retrofit straight into the top of the downpipe to prevent any unwanted debris blocking the drainage system.