Features: Bronze thru-hull transducer. Six beam, 53º, 455 kHz. Shaft diameter 0.81". 3D sonar applications only. Does not include fairing block. Dimensions: 4.25" diameter x 1.25" D(below hull). For Use With: Matrix 47 3D, 947C 3D, Wide 3D Vision, Wide 3D Vista, Wide 3D Paramount.