This upgrade is meant to be used on the dotm deluxe class bumblebee mold, its a replacement for the windows, with a better fitting ones for a cleaner look, cutting the "rally grids" is required, i recommend to dye it in clear blue/red/orange(depending on the repaint version used of the mold, to match figure original window colors this windows where made using exact meassures to provide a perfect fit on the original figure, can be used with the (Rally Grid) as well but it would render the purpose of this useless WARNING: model untested