Extension Cable f/500 Series VHF/AIS Antennas - 20'An easy solution to extending the cable on Digital Antenna's 500 series VHF and AIS antennas. Simply connect the included double mini-UHF male adapter between the 500 series antenna's mini-UHF female connector and the 500 series extension cable's mini-UHF female connector. The cable's other end accepts the 500 series antenna's PL-259 adapter.All Extension Cables for 500 Series VHF/AIS Antennas Feature:Our exclusive low loss, tinned braid, foil shielded, UV stable RG-8X marine cableFactory attached mini-UHF female and mini-UHF female connectorsDA624 mini-UHF double male adapter