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Echonautics Bronze Stem Thru-Hull Medium Frequency CHIRP Transducer - 600W 80-130kHzBronze Stem Thru-Hull Medium Frequency CHIRP Transducer - 600W & 80-130kHzEchonautics presents a range of powerful transducers from Dual Frequency CW to Low/Medium/High CHIRP and digital sensors, ... Learn More