Specifications:Antenna Type: circular polarization dipoleFront-to-Back Ratio: 3 dBFrequency Range: 87.5 – 108 MHzPolarization vertical and horizontalGain -3 dBd (referred to half-wave dipole)Bandwidth: 500 KHz maxVSWR: 1.1:1 tuned in factoryH Plane: omni-directional 1.5 dB (with a 4″ mast) Packing 16″16″39″ (406406991mm)V Plane: omni-directional 3 dB (with a 4″ mast)Impedance: 50 OhmsConnector: N type femalePower Rating: 500 Watts max.Wind Load: 8 Lbs (3.6 kg)Wind Velocity: 119 mph (190 km/h)Wind Surface: 0.3 ft2 (0.04 m2)Lightning Protection: all parts groundedMaterial: (external) stainless steelMounting: from 2″ to 4″ diameter poleWeight 7.7 Lbs (3.5 kg)Average Dimensions: 15″15″38″ (381381965mm) depending on tuned frequencyFor more configurations and options, call us! 800-426-8434