USF Magnet Window Adapter. Use this Window Adapter with our USF Oval Magnet-mounted Hoodware, the great new way to personalize your vehicle. Made from premium ABS molded plastic, Hoodware is produced from the same automotive racing vinyl used in NASCAR, with a durable epoxy coating. Tough molded plastic window Adapter is designed to come together with the Oval and lock into place on your car window, sliding glass door, or dorm window. Magnets do not lose their strength under any conditions and maintain 24 pounds of pulling force to ensure the 8 1/2" x 5 1/2" Oval will remain attached at any speed. By Hoodware. Made in the USA.