Garmin® AIRMAR® B744VL Long Stem Triducer. This bronze thru-hull mount transducer is used for steep deadrise vessels or thick, cored hulls. This 8-pin 600 W long stem transducer has a depth of 800 to 1,200 ft; an operating frequency of 50 to 200 kHz; a beamwidth of 45 to 12 degrees; and a 0 to 24 degree deadrise. Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat. When using with a 6-pin Garmin sounder, transducer adapter cable part number 010-11612-00 is required.