Garmin Small Connector Network Cable 2m. If extending a regular sized network cable, a GAX12531 coupler is required.
Product Accessories for Garmin Small Connector Network Cable 2m

SKU: GAX1253101
Garmin Marine Network Adapter Small to Large
The Garmin marine network adapter cable converts small (male) network cable to a large network connector in order to connect to your compatible Garmin chartplotter.