Raymarine ST300 P371 Speed SHORTY Thru-Hull Transducer Speed 31-256-1-42Raymarine ST300 P371 Speed Boat Marine Thru Hull Transducer Speed 31 256 1 42 Airmar SHORTY ST300 P371 31 256 1 42 works with ST300 P371 Bidata or Speed instrument diaplay units. Works also with Autohelm ST50 TRIDATA SPEED and Raymarine ST60 ST60+ TRIDATA SPEED Instruments You will receive the same item as in the photos. NOTICE TO THE BUYERS IN THE US: All duties and tariffs for US buyers are fully paid by us. We ship only via Express services (FedEx