Shakespeare 5241-R Low Profile 3' VHF Marine Antenna VHF Antenna 3' length 3dB gain 1"-14 threaded mount Sealed, tin-plated copper wire coil Requires mount with center hole for passage of the supplied 15' RG-58 cable PL-259 connector included Stainless steel whip (36 inch) Suggested mount styles 4187, 4188-S, or 4190 ratchet mounts