Product review (1 stars): Did not fit my machine, nor wall exhaust.
I had no issue attaching the plastic pieces on the tube.  The problem was it was the exact same size and would not fit.  I called the company and was told to purchase a specific item at Ace Hardware.  I went and bought exactly the item recommended.  Which was the exact size of the plastic end.  Horrible waste of time and money.  I have ordered dozens of items from Amazon.  I have never been this dissatisfied.