The front bumper material is 5" x 2" x 1/4" wall 42" long rectangle tube. I got a good deal on a 10' piece of this material so it was hard to pass up even though it wasnt the 3/16" thick material I was looking for. I'm hoping to cut this weight way down with my design. Although 38.6 pounds isn't really heavy, it's heavier than I want it to be.