Style 396-1 VHF 3dB Center-fed 1/2-wave coaxial sleeve Outstanding, basic 3dB antenna designed to reduce signal fading in rough seas. This is probably the most widely used antenna on Coast Guard vessels. Brass and copper elements Chrome-plated brass ferrule with standard 1&qout;-14 thread Includes 15" RG-58 cable and a PL-259 connector Suggested mount: Style 4187 Ratchet Mount One section Technical Specifications: Frequency:VHF Marine bandBandwidth:(within 2.0:1 SWR): 5 MHzSWR:1.5:1 at 156.8 MHzImpedance(Ohms): 50Gain:3 dBMax Input (Watts):50DC Ground:NOTermination:15" RG-58 cableHeight (feet):5Polarization:VerticalRadiation pattern:Omni-directional