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Sensor echo sounder Garmin gt20-tm 77 \ 200 + 455 \ 800 kHz (4-pin) 010-01960-00 with mounting on the Tran and Troller - AliExpress
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Garmin GT20-TM – Transom Mount ClearVü 500 W (CHIRP 455/800 kHz) Traditional 500 W (77/200 kHz) Transducer with Temp (8-pin) for Sale in Mission Viejo, CA - OfferUp
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Garmin GT20-TM Transducer on the Ice. How to make a Mount. [Ice Fishing with Boat Transducer] - YouTube
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