The SeaStar HC5313-3 Inboard Marine Hydraulic Steering Cylinder is engineered and manufactured for all pleasure and work boat applications up to 50'.• Low friction hydraulic steering• Easily installed on a single or dual rudder boat• Marine-grade aluminum• Meets A.B.Y.C. standards and NMMA certification requirementsSpecsStroke: 7"Displacement: 8.3 cu. in. Body Diameter: 1.375"Shaft Diameter: 0.625"Torque @ 1000 psi @35°: 5741 in./lbs. Easily installed on a single or dual rudder boat Marine-grade aluminum Meets A.B.Y.C. standards & NMMA certification requirements | Seastar Dometic HC5313-3 Inboard BA135-7ATM Hydraulic Steering Cylinder