Thanks.
The box is made from 14 gauge steel, so it is quite sturdy. I really wanted to install box that had the door on the side, but they were simply too expensive, and most that I saw were right at 36 inches, which is about 1/4 inch too long to fit. Then I got the coupon from HF, and I thought hmmmmmm...... I went there and asked if I could in box one, and when I saw it, I knew right away, that this would work. The overall construction and folds, made it look like it was made for this trailer as it really looks OEM, and for $90, I felt that was a good bet. With the beads of adhesive in place on the back and side, this made the fender stiffer, and I have no doubt that everything stiffened up, so that is a good thing.