Product review (4 stars): Sturdy and just what I wanted.
I do home maintenance and repair.  I have been looking for a sturdy elbow to use when I vent dryers.  I have had the articulated aluminum elbows I purchase from Home Depot come apart.  Most of the time I want a 90 degree elbow so I don't need the articulated version.  This is just what I have been looking for.  I ordered a dozen this time and am not disappointed that I ordered so many.  I will order more as soon as this batch is used up.