Thru-Hull Flush Mounted TransducerPerfect for water sports which require continuous accurate speed measurements like water-skiing, where boat angles can sometimes interrupt transom mounted senders.The thru-hull flush mounted temperature and speed sender offer virtually no drag. Easy installation and accuracy makes this sender the perfect choice for water sports.Specifications:30' (10 Meter) Cable IncludedRequires 2" hole in vesselEcho-sounding up to 200'Reads Water Temperature and SpeedUseable Shaft Length: 2.25"Bare Wire connection∗Factory P/N SN2031 and AirMar® P/N 31-590-1-41 (Model ST850)**Sold as an Individual