These 72 degree downpipe bends can either be used to offset the downpipe slightly or create a swan neck. To create a swan neck, you will need two of these bends along with a short piece of downpipe that has been cut to suit the length of the swan neck you need, this short piece of downpipe will go between the two bends. Each bend has a spigot on the bottom end, allowing for an easy fit into any length of square steel downpipe.