The LF3000 Linear Feedback Unit transforms the linear movement of a boat with an outboard engine to an analog signal for your autopilot steering computer. This waterproof unit has a 300mm (11'8") stroke and is constructed from stainless steel and epoxy coated saltwater-resistant aluminum. Mounts to the cylinder of the existing outboard drive unit with the included mounting bracket and clamps. Includes 8.5m cable. 18.3"L x 0.9" dia.