Comet SBB-1NMO Dual Band VHF/UHF 146/446 MHz Mobile Antenna'a whip section is enclosed in a dense but flexible rubber coating. Typically this antenna is the choice when it will be mounted on top of a truck, van, or other high profile vehicle. The height of the mounting location improves the antennas range, but also makes it susceptible to damage from low clearance obstructions.