Want to put Humminbird Sonar technology on your boat? If it floats, we"ve probably got the right transducer for it. Humminbird XP 9 28 T puck (shoot thru-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). 15-foot cable and epoxy included. Fits Humminbird head unit models: PiranhaMAX 176i, 195c, 175, 165.