Zinc Downpipe 100mm diameter*2400mm round gutter is a great choice for an easy and effective way to attach your downpipes to the wall. The downpipe should be fastened to the wall with astragals.  With Zincalume steel, you don’t have to worry about Rust, corrosion-resistant, and damage due to debris. There is a wide range of colors available in Zincalume steel to match or contrast with your roof. Steel and tile roofs are compatible with them. Installs quickly and easily on both tiled and metal roofs.