The Humminbird In-Hull Single/DualBeam Transducer is a 20/60 degree, 200/83 kH...The Humminbird In-Hull Single/DualBeam Transducer is a 20/60 degree, 200/83 kHz mount with built in temperature pigtail. For use in single layer fiberglass hull boats.FeaturesCompatible with: Matrix 10, 12, 15, 17, 20, 27, 67, 77, 87, 97, All...more