Garmin AIRMAR® B619 (20° Tilt)This bronze thru hull mount transducer performs well at high speeds and is an excellent choice for fiberglass and wood hulls. This 8 pin 500 W transducer has a depth of 900 ft; an operating frequency of 77 200 kHz; a beamwidth of 45 15 degrees; and a 16 to 24 degree deadrise. Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat. *Do not use on metal hulls.