The K40 SF-200K is a 2-foot tunable whip antenna designed for CB and 10 meter radios, operating within a frequency range of 26 to 30 MHz. Built with a 1/4" Superflex fiberglass rod, this antenna is made to endure demanding environments while maintaining signal efficiency. Its 1/4 wavelength design supports up to 500 watts of power and is compatible with any 3/8" x 24 threaded mount.