This product is either discontinued or we cannot get that from suppliers.
Brand: Garmin, Model: 010-10918-00, Type: Cable, Colour: Black, Compatible: Fishfinder 300C / Fishfinder 400C / GPSMAP 450/450s / GPSMAP 451s / GPSMAP 551s / GPSMAP 556s.
Connect or power your fishfinders and sounders with this power/data cable.