Airmar B60 20° Bronze Thru-Hull Mix & Match Cable NeededThe Airmar B60 20 MM Bronze Thru Hull Transducer is a high performance depth and temperature sensor designed for center console and trailered boats, delivering precise readings with a flush, low drag bronze exterior. Through hull design: 60 mm (2 3 8") mounting hole; usable shaft length 68. 5 mm (2. 70"); non retractable housing; suitable for hulls with up to 24 deadrise and compatible with fiberglass or wood. Bronze low profile housing: Bronze