Plastic Thru Hull Transducer Plastic 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. Plastic Thru-Hull Transducers require that a hole be drilled in the hull and the shaping of a fairing block. Professional installation is recommended. Bronze Thru-Hull Transducers are an alternative to Plastic Thru-Hull Transducers. Description: Single/Dual Beam, 20/60 Degree, 200/83 kHz transducer. 3.9"L X 2.5"W X 1.16"D. Shaft: 1.0" Diameter For Use With: Matrix 10, 12, 15, 17, 27, 67, 77C, 87C, 97, All 700 Series, All 300 Series, all PiranhaMax (except 240), 917c, 931c, 937c, 957c, 997c, 515, 525, 535, 565, 580, 585c, 595c, HDR610, Piranha 2, Piranha 4, XP2000, XP4000