Garmin B258 1kW Bronze Thru-Hull Depth/Temp w/FB - 8-Pin [010-10703-20]B258 1kW Bronze Thru Hull Depth Temp w FB 8 Pin Garmin's bronze, thru hull mount transducer with fairing provides depth and temperature data. This transducer has an operating frequency of 50 or 200 kHz and mounts on a 0 25 deadrise angle. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov. Specifications: