Garmin Transducer Adapter Cable (P72/P79/GT30, for Echo
Garmin GT21-TH – Stainless Steel Thru-Hull DownVü 500 W (CHIRP 260/455 kHz) Traditional 600 W (50/200 kHz) Transducer with Temp (8-pin) - Macete Electronics cc
Garmin GT30-TH 010-01961-10 12-Pin Thru-Hull Transducer - Open Box - Max Marine Electronics