The Wedgetail platform roof rack is the first roof rack of its style to allow for fitment around vents and air conditioners often found on RV's and campervans. The Vent Hole Kit allows you to trim crossbars out of your Wedgetail platform roof rack to clear the obstacles on your roof. You may need to clear a vent, air conditioner or even a sunroof. This kit allows you to remove a section of up to three crossbars.