Product review (4 stars): Quality periscope vent compared to other brands
I had to cut this up and resize the thing to make it work for me but great product. The size thing was because there wasn't adequate space behind my dryer to fit the remaining excess parts of the vent when retracted between 4-5 inches. I couldn't find anything that would work for my needs so I ordered these and adjusted it to work. After sealing up the edges and corners with aluminum foil tape it's perfect with no leaks. There are sharp edges to this so be careful when pulling it apart.