The link to Humminbird XP 14 20 T - In-Hull SOLIX/ONIX DualBeam Transducer has been copied
This Humminbird In-Hull Transducer mounts to inside of most single-layer fiberglass hulls using slow-cure epoxy. (Cored fiberglass, metal or wood hulls not acceptable. Hull must be free of trapped air and voids.) Dual Beam, 20/60 degrees, 200/83 kHz, temp pigtail for ION/ONIX Series.