Humminbird 710262-1 Xm 9 20 Msi T Mega Transom Transducer For Helix Side Imaging. MEGA SI,MEGA DI, DualBeam PLUS, 20/60/86/55 degrees, 200/83/455/800 kHz and 1.2 MHz, temperature built-in. For HELIX MEGA Side Imaging units only. Quick and easy installation.








