Transducer Shield Humminbird G3N SI+DI# XM 9 HW MSI T or G2N SI+DI #XM 14 HW MSI T Armor Plate - Armor Plates are designed to protect the transducer from side to side as well as front and back impact. They are designed as an added attachment to SBB-5 Spring Back Bracket for all around transducer protection. High Quality Aluminum Alloy; Black Powder Coated for installation on the boat transom; This product is designed to fit: Humminbird Helix G3N Mega SI + DI + Dual Spectrum Chirp transom transducer # XM 9 HW MSI T . or Solix G2N Mega SI+DI+Dual Spectrum Chirp transom transducer # XM 14 HW MSI T ; It is very important that you know your transducer when ordering this product. The transducer number can be found labeled on the cable closest to the transducer plug; Dimensions10 x 4 x 4 in;