Garmin B75M Bronze 20° Thru-Hull Transducer - 600W, 8-PinGarmin B75M Bronze 20 Thru Hull Transducer 600W, 8 Pin. A rugged bronze through hull solution designed to deliver precise depth and temperature data while adapting to all hull deadrises. The tilted element inside the transducer accommodates a wide range of deadrise angles and eliminates the need for a separate fairing block. This broadband transducer supports both traditional sonar and Spread Spectrum scanning when paired with a compatible sonar