Aquarium Brush - Cleaner for Eheim Fluval Hagen Filter Pipe You are winning 1 Magic Spring Brush Washer The Magic Spring Washer has a very soft spring, this brush is absolutely perfect for cleaning magic glass lily pipe or any brand of canister filter. It is especially useful on inflow pipes where pushing other brushes over and through the "arch" portion can be difficult, the Spring Washer moves easily and naturally all the way to the bottom. An absolute necessity for cleaning all filter pipes Made for any canister filter pipes with inner tubing diameter 13 mm to 25mm. (0.5 inch to 1 inch) Length of the product is 50cm (21 inch) .