THIS PRODUCT MUST SHIP TRUCK FREIGHT AND DOES NOT QUALIFY FOR ANY SHIPPING PROMOTIONSStyle 476 VHF 10 dBPhased 1/2-wave elements in a collinear array with a broadband matching section, and a coaxial choking sleeveThe Style 476 antenna is designed to get the message through when all others fail. Its unique design puts the signal on the horizon, providing gain in all directions. It's the first choice for heavy duty seagoing applications, such as workboats, tugs, tidal well service boats, etc, and an excellent antenna for land-based stations.Brass and copper internal elementsSO-239 connector at the baseThe 476 has a 2-3/4 diameter x 26" long 6061-T-6 aluminum sleeve which can be strapped directly to a mast or used with Shakespeare Style 483 Clamp Set or Style 484 Wall Mounting Brackets.One sectionTechnical Specifications:Frequency:VHF Marine bandBandwidth:(within 2.0:1 SWR): 10MHzSWR:1.5:1 at 156.8 MHzImpedance:(ohms): 50Gain:10 dBMax Input (Watts):350DC Ground:YESTermination:SO-239 connectorHeight (feet):21Polarization:VerticalRadiation pattern:Omni-directional