Are you mating your walls and ceiling and getting all sorts of weird and wonky ripples dipples dips whoops curves and loopedy doos? This is a cost effective way to eliminate all of that nonsense and get crisp edges where the walls and ceiling meet. This is a simple kit consisting of 4 pieces of aluminum bent at 115 degrees in the corner of your van for a flat uniform surface for your walls and ceiling to meet. Fits both Ford Transit Medium and High roof vans in all wheelbases. To adjust for length we recommend simply overlapping the joint. This is also useful for spacing off the walls to avoid any wiring you don't want your walls/ceiling rubbing up on. Installation is as easy as using self tapping screws to fasten to the walls and/or ceiling.