This product is either discontinued or we cannot get that from suppliers.
Brand: Garmin, Model: 010-12881-06, Type: Antenna, Colour: Black, Compatible: Montana 700i / Montana 750i.
Use our external passive antenna/extension cable when you want to install an external GPS/Iridium antenna. Can be used on the exteriors of vehicles or buildings as antenna is magnetic. Antenna cable is 1.5 meters (4.9 ft) long; dongle, or adapter cable, is about 0.2 meters (8 in).