This is the back of the stretch. The paneling has some really nice grain patterns. One sheet that I found had bookmatched flitches mated on the center of the sheet. Score! I ripped it in half and the became the side walls of the stretch. The stretch has 1" foam insulation to match up with the frame on the back of the Uhaul box. The rest of the box is 3/4" FRP walls with 3/4" foamboard covered by 14" plywood walls and white FRP ceiling.