Garmin 8-Pin Female to Wire Block Adapter f/echoMAP™ 50s & 70s, GPSMAP® 4xx, 5xx & 7xx, GSD™& 24Garmin 8 Pin Female to Wire Block Adapter is the essential bridge that lets you connect legacy 6 pin transducer wires to modern sonar inputs needing an 8 pin connection. This adapter from Garmin keeps your existing hardware compatible with newer charts and sounders, saving you time and money during upgrades. Compatibility and coverage: Works with Garmin devices including echoMAP 50s & 70s, GPSMAP 4xx, 5xx & 7xx, GSD, and 24 series. Facilitates