Product review (5 stars): Brown Hood Perfect for Tan House!
I really love this dryer vent hood, and the idea that it is USA made.  The product comes with a piece of flat sheet metal with a channel that locks when you make it a tube, so don't roll it first if you intend to trim it.  I put a 4" hole in the stucco and continued to put a 4" hole in the sheet rock, making sure both holes used the same center point.  I knew I wanted to use a dryer dock, also available on Amazon, so the sheet metal tube needed to be cut so it terminated flush with the sheet rock, while protruding about an inch to enter and lock in this dryer hood.  In my application, I needed about 6" total, and trimmed the sheet metal easily with tin snips.  The dryer hood was secured by four screws and anchors (not provided), which are hidden when the flap comes to rest.  The interior was held in place by the dryer dock piece, although this product includes a plate that takes four screws (not included) for use in a different application.  Everyone likes the look; it performs beautifully, when the dryer goes to work!