Tram 1487 VHF Land Mobile Base Antenna: * 58" tall * Frequency response: 134-184MHz * 4.5dB gain * Heavy-duty fiberglass construction * Includes three 20-1/2" stainless steel radials * Impedance: 50ohm * UHF female (SO-239) connector * Mast diameter accepted: 1.81" x 2.44" * Includes bracket