Long stem for hulls with steep deadrise or thicker cored hulls,Compatible with the following sounder modules: , DSM30, DSM300, Compatible hull material: Wood and fiberglass, Max power: 600 watts, Frequency: 200/50 kHz, Cable: 30ft (10m) cable with connector, Hole diameter for installation: 2″, Other: Self-sealing removable paddle wheel insert,High speed fairing block is included,**Requires E66066 Adapter Cable for use with the a,c,e,eS Series built in Sonar Models.**.