6m VHF Base station antenna directional, high-gain horizontal polarization made of aluminum alloy 6063 T-832 Ype: 0.66 , 5 elements Yagi antenna frequency range: tunable from 50 to 54 MHz Impedance: 50 Gain: 8,4 dBd, 10,5 dBi Front to back ratio: 20 dB typical Max. Power (CW) 600 watts Connector: UHF-female Materials: Aluminum, Zamak, Zinc plated steel Dimensions (approx.): 3038x4030x100 mm / 10×13.2×0.3 ft. Weight (approx.): 6100 gr / 13.5 lb. mounting mast: ø 35-42 mm