Raymarine B175H Bronze Low Profile 1000W D/T Through Hull Transducer 20° AngleRaymarine B175H Bronze Low Profile 1000W D T Through Hull Transducer 20 Angle Raymarine B175H Bronze Low Profile 1000W D T Through Hull Transducer 20 Angle is high performance, 1000W bronze through hull transducer is specifically engineered for those who demand precision and clarity at speed. As a "Low Profile" model, the B175H sits nearly flush against your hull, protruding less than 6mm (1 4) outside the boat. This design significantly reduces drag