Garmin *NEW* P319 6-Pin 50/200 khz Transducer for GSD 20 21 22 & GPSmap 400 500 - Max Marine Electronics
Garmin Gsd 24 Digital Black Box Network Sounder
Amazon.com: yourour 010-10272-00 Heavy Duty Transducer Mount Bracket,Transom Mount Bracket Compatible with Garmin Fishfinder,GPSMAP,GSD : Industrial & Scientific
Garmin GSD 20
Garmin GSD20 Sounder Module W/Power Cable - Tested Working - Max Marine Electronics