Garmin 010-10703-20 50/200KHZ B258 Depth/Temp 8-PinThe Garmin 010 10703 20 is a dual frequency depth and water temperature transducer designed for boats that require reliable readings in a variety of conditions. Featuring Airmar's B258 bronze thru hull design with an integrated fairing, it delivers accurate data at 50 kHz and 200 kHz, compatible with hulls up to 25 deadrise. Bronze thru hull transducer with integrated fairing: durable bronze housing with a built in fairing for smoother hull