Seastar Pro is for high-class boats with single non-power-assisted outboards up to 350 HP, especially those capable of speeds over 60 MPH, which demand greatest steering power and reassurance. It is appropriate for use with high-performance propellers and jack plates. Features: SKU: HK7500A-3 UPC: 731957925701 Mass: 28.00 LBS Additional features: Original steering lock valves Low resistance hydraulic steering system 4.25 turn from lock-to-lock. Dense helm has only a 4-7/16 trail - needs only a 3 dash outlet (tilt needs a larger hole) Elective SeaStar Pro cylinders with longer shaft bushings and even larger pivot bushings for an even more solid feel Factory swaged hoses are Kevlar reinforced Packaged full with wheel, cylinder, fittings, oil, and bleeder kit and featured instructions Standard 3/4 tapered steering shaft Quick, simple installation Meets A.B.Y.C standards Meets N.M.M.A. guarantee requirements SeaStar Pro is proper for use with jack plates and performance props Note: Remember that Nylon tubing is no longer recommended for SeaStar Pro steering. Use only HO57 type hoses. SeaStar Pro is for high-performance boats with single non-power-assisted outboards up to 300 hp, especially those capable of speeds over 60 mph, which demand maximum steering control and comfort. Suitable for use with high-performance propellers and jack plates. Kit includes helm, cylinder, fittings, oil, bleeder kit and instructions.-Caution: Nylon tubing is not recommended for SeaStar Pro steering Use only HO57 type hoses.