Review on 🌀 Whirlpool 4396037RP Vent Periscope - Optimal 0-to-18 Inch Extension for Improved Airflow by Victor Ahmed

They're fairly thin metal but it doesn't need to be very strong and you'll probably want to trim off the excess with metal snips. But the design could be a little better. The pleats aren't as even as I expected, and the parts that connect to the other vent pipe and dryer aren't as heavily puckered as I'd like. But it works, and it's not a deal breaker. You want aluminum metal tape to be used to vent the dryer or you'll have air leaks. This is not intended. It simply closes all the seams and hides the sharp edges left over from trimming the pieces, right down to a box. But it's important for people to know that these are square corners. Our hood dryer sat just off the floor, and although it had to be tilted slightly, luckily the bottom corner barely touched the floor. One more corner and I would have to modify it to bring that low angle down. But overall it serves its purpose.