Maco's Alpha V58 is a highly efficient, omni-directional base station antenna that provides outstanding performance. They're designed for use on CB (11 meter) and 10 meter bands with a field adjustable frequency ranger of 26 - 33 MHz. The 5/8 wavelength helps provide higher gain and increased distances over a 1/4 wave antenna. Rated at 1200 watts. Bottom section accepts 1-1/4" masts