These transducers have been included as standard with mn100 T100 Speed and Depth systems since August 2004. Prior to this the T100 was supplied with the T904 Shorty Speed Transducer. Supplied with 6 meters of cable,Features: Max. Hull thickness 2.125″ (55mm), Fitted with a flap valve, Includes temperature sensor, 2″ diameter, For Hull thickness up to 2.125″ maximum, Fitted with a flap valve to reduce water ingress when removed for cleaning, Supplied with a low profile housing and blanking plug, Includes internal temperature sensor.