For 80/100 mm downpipes: BKITC black downpipe extension comes with two different downpipe adapters that are suitable for 80 mm and 100 mm downpipes (note: please check the size of your downpipe before purchasing). Waste water pipe extension is suitable for use in houses, garages and garden sheds to efficiently drain rainwater and protect the foundations from moisture Robust: rain pipe extension is made of thick PE material, which makes it more robust than other products. It can carry a weight of up to 5 kg without deformation. Bad weather (such as storms or snow) will not affect or damage them. It can also be installed underground Flexible: gutter drain pipe extension can be easily extended from 47 cm to 150 cm and installed on the downpipe outlet, it can be adjusted to any desired shape and can be easily restored. Downpipe hose provides high flexibility, without deformation or cracks Easy installation: no professional tools required. Simply turn the adapter counterclockwise to connect it to the pipe, and attach it to the downpipe drain with a screw Box contents: 1 x downpipe extension; 1 x 80 mm adapter; 1 x 100 mm adapter; 2 x screws; 1 x user manual