GIK's Tri-Traps are constructed with plastic nowadays? Whenever I bought my Tri-Traps about three years ago the framing was made from heavy duty cardboard and 1"x 1"s, which worked out good because I trimmed a couple of them to fit on top of an existing pair already in he corners to fill each front wall corner from floor to ceiling.
I bought mine about a year and a half ago and the top and bottom plates are plastic (maybe 1/8 to 3/16 of an inch thick). The frame is probably still made the same way. I would still recommend them if you don't feel like a DIY project.
