Raymarine B175L Bronze Low Profile 1000W D/T Through Hull Transducer 12° AngleRaymarine B175L Bronze Low Profile 1000W D T Through Hull Transducer 12 Angle Raymarine B175L Bronze Low Profile 1000W D T Through Hull Transducer 12 Angle are a powerhouse of a sensor, designed for those who need uncompromised depth performance and precision. Constructed from high quality bronze, this through hull transducer is specifically engineered for fiberglass and wooden hulls. Its "Low Profile" design is a game changer for trailerable boats;