Product review (4 stars): Great product. the design makes it easy to clean ...
Great product. the design makes it easy to clean out the vent pipe. This is the second time I bought this product.  the first one deteriorated from the sun as I did not paint it. It lasted about 15 years. I learned from the manufacture that they sell just the top (which is what fell apart).  This second one I painted in hopes it will last a few years.

This vent works great for the low opening from the crawl space. It might be a bit tricky to connect to the metal vent.  Don't try connecting it to a flexible hose.  You should have a metal duct going through the wall.

1 star dropped for not using UV resistant plastic.