Francis Pre-Tuned CB Antenna

Ideal for CBers that want an antenna requiring little setup or tuning Available in 3', 4', 5' and 5.5' lengths Description The Francis Pre-Tuned Antenna goes from the box to the airwaves in no time at all. Quickly mount your antenna without the hassle of a long setup time. These antennas don't usually require tuning, but it's important to test SWR to ensure safe operation levels. Why?  Lack of a ground plane or other issues unrelated to antenna length can cause high SWR levels and may potentially damage radio equipment if not corrected. Specs Model / SKU: Francis CB Series 3, 4, 5 Recommended for: CB users seeking an antenna that can be quickly set up and operational. Fiberglass construction is ideal for pick-up trucks, semis and large passenger vehicles. Can also be used with cars and vans, but magnet antennas are often easier to install. Notable Features: Pre-Tuned for Minimal Adjustment, Exclusive Double Helical Winding Compatible with: Antenna uses male 3/8" x 24 th