Humminbird MHX HS Transom Transducer Mounting Bracket Kit - The MHX HS is a transducer mounting hardware kit for XHS model transducers. Compatible with: XHS 9 HDSI 180 T, HELIX 12 CHIRP SI GPS, HELIX 10 SI GPS, HELIX 9 SI GPS, 1199ci SI GPS, 999ci SI GPS, 1198c SI GPS, 998c SI GPS Manufacturer 1-Year Limited Warranty