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′; an operating frequency of 77/200 kHz; a beam width of 45°-15° degrees; and an 8° to 15° deadrise. Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat. Do not use the Airmar B619 thru-hull mount transducer on metal hulls.