Product review (3 stars): It works but is quite flimsy
Have the obvious application:  dryer vent pipe to the outside is on the side wall next to where the dryer needs to go.  It juts out from the wall such that the connected dryer hose forces the dryer to be quite far from the back wall.  The space is too narrow for a regular right angle bend.  I ordered this to create a narrow extension up and back so the dryer hose would connect in the sapce behind the dryer and the dryer could sit next to this piece comfortably, set back closer to the back wall.  This unit arrived in two pieces.  It was obvious one should slide inside the other, but there were no markings so it took some fiddling to figure out which went inside.  The alumnium is very thin -- had visions of a good cut and trip to the emergency room when assembling it. This unit will not take any type of force applied to mate it to either the vent pipe or the dryer hose - it readily buckled and bent.  Recommend applying some lubricant to help it slip onto the connections.  it finally did work and does work quite well, but installation was not as easy as it could have been if the aluminum were of a heavier gauge and the joints welded rather than simply bent into shape.