VHF Marine boat 3 foot (39") Antenna Scout KS21. Pressure injected foam waterproofs inside, UV inhibiting paint protects the outside. Pressure Foam filled protecting the element and UV protected high gloss finish Standard 1"/14 threading is universal fit for all marine antennas 16.4 feet of top quality shielded SCOUT coac cable Frequency: 156,162MHz, Impedance: 50 ohm Gain: 3 dB Max power input: 50 W DC Ground: Yes Whip material: Fiberglass, Ferrule material: Reinforced nylon