Shakespeare Galaxy Style 501817'6 VHF 9dB GainPhased 1/2 wave elements in a collinear array with choking sleeve to suppress cable radiationThis highly sophisticated design is outstanding for long distance communications. Extra rugged for salt water durability, and stability in high seas. Surprisingly light weight.Brass and copper elements for maximum range and efficiencyStainless steel ferrule with standard 1"-14 thread20' RG-8/X low-loss cable plus a PL-259 connectorSuggested Mount: Shakespeare Style 409-R or 410-R Mounting Kit (pictured mount not included)Two sections: Base 105", Tip 105"Technical Specifications:Frequency:VHF Marine bandBandwidth:(within 2.0:1 VSWR) 3 MHzSWR:1.5:1 at 156.8 MHzMax Input (Watts):150DC Ground:NOHeight (feet):17.5Polarization:Vertical