Product review (4 stars): Close Elbow shipping
I only needed 1 elbow but ordered 2 just in case I made some mistake installing it.
This turned out to be a wise move as one of the elbows was smashed on arrival in the shipping case. As return shipping would have cost more than the item I simply discarded the smashed one.

The one I did install worked very well and I was most pleased with the outcome as I can now push my dryer closer to the wall and close the doors that hide the washer/dryer.