Product review (2 stars): This 90 Elbow needs some extension of length to best work for all dryers.
First will admit I am keeping this item, but primarily ONLY for the included silicon ring adapter for the dryer's OEM vent outlet, this ring does make mounting the exhausting vent tube to the dryer much much more secure--wish I could just buy this ring alone. This item's concept is sound but the engineering is not, first on our Bosch dryer 3/4 of the area surrounding the dryer's exhaust vent is built out maybe by at least 3 inches, unfortunately upon attempting to mount this 90 Elbow doesn't have enough length before the 90 degree is interfering with the dryer's body. One will need to instead use a coupler for greater extension, tape those connections, the top of the elbow has a pivoting ring(which is a nice feature) but it quite easily snaps apart or can torque itself apart some if the dryer is not completely leveled to the wall, thereby allowing dryer's venting exhaust air to escape inside, if not cognizant of this issue. The flat part of the elbow is well designed for snugging up against the wall, I still used tape on most seams, of this 90 Elbow, to exhaust vent outside and not inside our home from any slight gaps. I wished this item could have been made in a more expensive feeling plastic as well, I believe it would have fit together better and more securely, I did not step on it but if feels like it could easily crack, maybe if even torqued some given some continued use.