Humminbird XTH-9-SI-160P Plastic Thru-Hull dual and side imaging, 20/74/160 degree, 200/50/455kHz. Transducer dimensions: 6:L X 3"W X 1.4"D (below hull); Shaft diameter: 1". Includes plastic fairing block. For Use With: 981C SI and 987C SI Combo only
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