Galvalume Elbows are fittings that attach to the galvalume downspout and outlet tubes. One end of the elbow is factory crimped so that it can fit easily inside another elbow or downspout. Galvalume Elbows are used at the bottom of the downspout at ground level to direct drainage in a particular direction. And two of them are also used at the eave to allow the downspout to be installed directly against the wall. We carry 3" and 4" elbows to go with our galvalume plain round and rectangular downspouts.