Built for performance and durability, this flagship Phase III™ VHF antenna will stand strong against high speeds and high winds. Combining our innovative construction of a ethafoam spacer system in a fiberglass radome with a sleek and luxurious appearance, this antenna is a master of VHF communication. Silver-plated outer conductor, copper inner conductorStainless steel mounting sleeveType SO-239 connector inside mounting sleeve for easy mounting and dismounting for stowageSuggested mount: Shakespeare® 4187-HD Ratchet MountGain: 6dBBoat Length: 22'+