OVERSIZE! This item exceeds standard freight size limits. Additional shipping charges may be applied to your order at time of shipment. - Shakespeare 476 VHF antenna Phased 1/2 wave elements stacked in collinear array with a choke stub to suppress cable radiation and a band spread matching sleeve. Length is 18 feet 5 inches. Frequency: Covers Marine VHF Marine Band. SWR: 1. 5:1 or less. Bandwidth: 10MHZ. Max. Power Input: 350 watts. Polarization: Vertical. Pattern: Omni directional. Vertical Beam Width: 20 degrees. Impedance: 50 ohms. DC Ground: Yes. Termination: UHF connector (accepts PL-259). Gain(Omni directional): 10 db as compared to typical 1/4 wave installation.