Garmin 43 Thru-Hull Speed/Temperature Transducer GST. The transducer can retrofit an existing Nexus 43mm thru-hull transducer (TH43). Bundled with the GST 10 the GST 43 can connect directly to the NMEA 2000 network and the information can be displayed on a compatible Garmin chartplotter or instrument display. Specifications for Garmin GST 43 Thru-Hull Speed/Temperature Transducer: Manufacturer: Garmin Color: Black Features of Garmin GST 43 Thru-Hull Speed/Temperature Transducer Mounting Style: Thru-Hull Package Contents: Garmin GST 43 Thru-Hull Speed/Temperature Transducer Garmin 010-04283-00: 43 Thru-Hull Speed/Temperature Transducer GST