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The Garmin Transom Mount transducer for GSD21 and GSD22 with built-in temperature sensor is perfect for outboard boats under 25'. Complete with a Transom Mounting Bracket, the transom mount transducer is easy to install and works great on almost any hull style.
Compatible with Garmin GSD20, GSD21, GSD22,GPSMAP 178C/250/250C/GPSMAP 298C/100 Blue/160 Blue/240 Blue/ 188/188C/320C/498/398/198C/340C/250/250C/238/235/400c/440S/441S/430S/431S/540S/530S/541S/531S/545S/535S/546S/536S Garmin PN 010-10272-00.










