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 T905 Shorty Depth Transducer. Supplied with 6 meters of cable.Features:2″ (51mm) diameterMax. Hull thickness 2.125″ (55mm)Removeable for cleaningRetractable Thru Hull Depth Transducer Specifications:Chirp: NoTemperature: NoSpeed Included: NoMounting Style: Thru-HullBox Dimensions: 4″H x 5″W x 6″L WT: 1.4 lbsUPC: 5037707009123