Garmin Accessory Garmin GST 43 Thru-hull Speed/Temperature Transducer 43mm. 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 43mm: Manufacturer: Garmin Size: 43 mm Color: Black Additional Features: GST 10 Bundle included Package Contents: Garmin Garmin GST 43 Thru-hull Speed/Temperature Transducer 43mm Garmin 010-04284-00: Accessory Garmin GST 43 Thru-hull Speed/Temperature Transducer 43mm