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Garmin GT20-TM 4-Pin Transom Mount Transducer│CHIRP ClearVü - DownVu│500W│455kHz 753759152758 | eBay
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Garmin GT20-TM Transom Mount Transducer - *NEW* - 8-Pin Blue - 010-12087-01 - Max Marine Electronics
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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|Fish Finders| - AliExpress
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