Inboard Boat Hydraulic Cylinder - BA150 ATM | SeaStar HC5314-3 SeaStar Inboard Boat Hydraulic Cylinder - BA150 ATM | Dometic HC5314-3 Inboard hydraulic steering cylinder works with Seastar Solutions & Teleflex marine hydraulic steering helms to provide smooth, fatigue free steering. Dometic Seastar inboard hydraulic steering cylinder BA 150 ATM model For single or dual rudder inboard powered boats Two axis articulation Cylinder is supplied with bleeder fittings Anodized aluminum 1.75 in. cylinder body diameter with .625 in. shaft diameter 7 in. stroke 10.2 cubic in. displacement 1.50 in. body diameter 0.625 in. shaft diameter Torque @ 1000psi @ 35° = 7117in/lbs