The Accusteer PUMPLA17-12 Linear Actuator is designed to interface an autopilot system with mechanical steering systems such as wire, cable or chain drives. This linear actuator consists of a hydraulic drive unit, steering cylinder, and interconnecting hoses. This unit is also available as the PUMPLA11-12 using a 1.5\" x 9\" RAM. @ 10.5 in. Rudder Shaft to Tiller Bolt Distance): 10450 in. lbs. (1181 Nm) Raymarine Equivalent Linear Drive: TYPE 2 (Recommended Maximum Boat Displacement = 48,500lbs (22,000kg)) Simrad Equivalent Linear Drive: HLD2000L « less