9dB Phased 1/2-wave elements in a collinear array with a coaxial choking sleeve to suppress cable radiation The top choice for charter boat captains and experienced sport fishing enthusiasts. This long-distance VHF antenna is rigid enough to stay erect in rough seas, yet exceptionally lightweight. 9dB GainBrass and copper elementsChrome-plated brass ferrules, includes 20' RG-58 cable and a PL-259 connectorTwo sections: base 162", tip 66".DC ground: NoSuggested mount: 409 or 410 mounting kit for deck or side mounting