Product review (5 stars): It was in excellent condition and came with the holder thingys
It was in excellent condition and came with the holder thingys...can't think of the name. I don't know how they figure this is 0-18 inches. I had to go verticle about 12 inches and it didn't work. Hard to explain. I think if I would have went horizontal it would have worked (but the dryer outlet from the wall was 12 inches high). I returned it.

I had to go to home depot and create my own using a flat vent for 7 bucks, and the long round tubing for 12 bucks. There is a gap between the dryer and the wall, but not as bad as it would have been without the flat vent.