4.7 inch antenna mast update your car outlook. And you don’t need to worry about the antenna being scratched when entering the garage. Easy to install, just unscrew the old one off, screw the new one on, plug and play. Waterproof and car wash proof. It is suggested that the antenna should be removed during automatic car washing to avoid antenna damage, and the service life of the antenna can be extended by routine maintenance. Antenna's external is made of 6061 aluminum construction which is corrosion protection and durable. Antenna's internal is copper construction. Copper is the best conductor for terrestrial radio waves. Satellite services, Sirius Radio will not be affected. Not only does the short antenna improve car's fashion. It also works great too. The antenna is functional and designed for AM/FM radio signal. Aftermarket aluminum antenna replacement for: 2009-2018 Ford F-150,1999-2019 Ford F-250 F-350 Super Duty.