Ultra Trail EZE II Wind foil. Increase your mileage. No filling. Easy to install.When towing 5th wheel trailers, spring loaded struts allow deflector to lay back at higher speeds for maximum efficiency and stand straight up for required clearance between deflector and trailer when maneuvering. No holes to drill and installs in minutes. Can be removed in minutes and fits all full size pickup trucks. Saves fuel, keeps bugs off trailer.