720073-3 fits for HELIX 7/8/9/10/12/15&SOLIX 10/12/15&APEX 13/16/19(CURRENT) and for 700Series, 800Series, 900Series, 1100Series, ION, ONIX(DISCONTINUED). Compatibility Compatible with Humminbird HELIX, SOLIX, and APEX systems, as well as legacy ION and ONIX models.
