Bronze Thru-Hull Transducers are for large boats and for boats with in-board motors that make typical Transom Mount Transducers ineffective. They are not recommended for trailered boats as the transducer is not flush with the hull. Bronze Thru-Hull Transducers require that a hole be drilled in the hull and the shaping of a fairing block. Professional installation is recommended. Plastic Thru-Hull Transducers are an alternative to Bronze Thru-Hull Transducers. Description: Bronze thru hull transdcuer, dual beam, 20/74 degree, 50/200 kHz. Transducer size: 5.25"L X 2.75"W X 1.2"D (below hull). Shaft diameter: .86". Fairing block not included. For Use With: 931C DF, 937C DF |
