Flex Elbow for downspout to discharge into barrel opening. Flex elbow will extend from 18-48 inches long. It fits 3"x4" downspouts. It makes it very easy to wrap a downspout around the corner of a building or house in order to better conceal the rain barrel. Simply cut the downspout where you want to install flex elbow and then slide it in place. You will need no other tools to install other than a saw to cut downspout.