Garmin GT12M-THF Bronze Thru-hull Medium CHIRP 12d Tilted Element Depth/TempThe Garmin GT12M THF Bronze Thru hull Medium CHIRP 12 Tilted Element Depth Temp transducer is engineered for midsize fishing and cruising boats, delivering high definition sonar with minimal drag. With a bronze thru hull design and precise 12 tilted element, it helps you detect targets clearly and interpret fish arches for easier schooling and species identification. Bronze Thru Hull Housing: Durable through hull flush mount design reduces drag on