Thin metal construction. The pictures make it look “beefy” but it’s not. Probably will blow away in a strong wind. Much smaller than they make it look. I read all of the questions asking about where the propane tank goes and it said it is hidden (which I took to believe it stored under the table) But no! It has to be hooked up outside the unit. I should have figured it out on my own but I didn’t. My bad. Extremely disappointed. Can’t send it back.