Product review (2 stars): This is constructed with "beer can" gauge aluminum
This is constructed with "beer can" gauge aluminum. It came crushed in the box although the box did not show that much sign of damage it was pretty bent up. I needed a dryer and with the beer can aluminum I was able to bend it back somewhat into shape. It was too long and I could not find my tin snips. No problem. I used an old pair of scissors to cut the unit to size and got a tube of silicone rubber to seal all the leaks.