Strengthening frame for Mercedes Sprinter, VW LT MWB high top roofs - cutout in driver cab For vehicles equipped with a flat roof as standard and roof skin. Theframe is glued to the roof with Sikaflex and additionally screwed with steel rivets (5 mm). The strengthening frame is designed following the guidelines fromMercedes and VW. Maximum cutting width, on the side the roof skin is attached tothe inner panel of the van.