TRAM 1480 Amateur Dual-Band Base Antenna. 8ft tall Heavy-duty, fiberglass construction 144 MHz - 148 MHz/430 MHz - 450 MHz 6dBd gain VHF/8dBd gain UHF 2 sections Imp: 50_ UHF (SO-239) connector Mast dia accepted: 1.81" - 2.44" Includes bracket & three 20.5" radials