WE are only providing information. I have close down my shop and retired . So now means no money and lots of time. over the years have seen many different m100 m416 trailers some army some not. Most 1/4 t trailers that where WW2 seam to be 38 & a 1/2 wide. There where many that made different sides so when we made replacement panels we use slip molds. To make what was need .We could make them as deep are as wide as you want.So I been ask to make a repair panel for a WW2 dump trailer and a custom trailer for a harbor freight 40" by 48 trailer with no mold.so this how I will do it.