In 2019 Hobie introduced the Guardian Retractable Transducer Shield. We had significant requests from our customers and from our Dealer Network wanting added protection for their Side Imaging transducers for the Guardian Transducer shield. This cover fits Lowrance, Garmin and RayMarine Transducers. See the list below for the models this unit will fit. Transducer Designed for use with: Lowrance o TotalScan & HDI transducer o StructureScan 3D SideScan o TripleShot o Active Imaging 3 – in – 1 Transducer Garmin o GT40, GT41, GT51M, GT50, CV20, CV23, CV52 and CV51 RayMarine o RealVision 3D Sonar Transducer