Humminbird 9 20 MSI T MEGA Plastic Thru-Hull Transducer XPTH 710264-1. 2 MHz. Temperature built-in plastic through the hull transducer.30' cable Transducer dimensions: 7.34"L x 3"W Shaft diameter: 1.0" Specifications for Humminbird XPTH 9 20 MSI T......