"Raymarine Active Depth/Temperature Thru Hull Transducer Brand New Includes Two Year Warranty, The Raymarine T914 is a retractable through hull active depth transducer with frequency of 235 kHz and 2"" hole diameter
This through hull transducer can be easily connected to the T122 wireless NMEA interface for use in systems where boat speed is available from a GPS. It is easily removable for cleaning and consists a long cable with maximum hull thickness of 2.125"". T914 Features: Thru Hull Transducer, Part Number: T914, Frequency 235 kHz, Removeable For Cleaning, Depth Transducer, 2"" Hole Diameter, Max. Hull Thickness 2.125"", Right Angle Cable Exit, For Raymarine Models: T122 Wirless NMEA Interface"