Sea Star Hydraulic Oil is a non-compressible fluid that helps transmit power between hydraulic-powered machinery. Hydraulic oil works as a coolant, lubricant, or sealant within the equipment. Application of external force driven from the piston within the cylinder produces compression. Since hydraulic oil contains a non-compressible property thus works perfectly to power up the engine. Key Features: Formulated to provide the best performance for your SeaStar or BayStar steering system A perfect mix of viscosity stabilizers Engineered and validated using a proprietary additive package offering control and protection for precision system components. Effective anti-wear agents Corrosion inhibitors ensure the utmost system component performance Protects against rust and oxidation Non-compressible and thermally stable Cost-effective and efficient Product Specifications: Brand: Sea Star Solutions SKU: HA5430H UPC: 731957801029 Weight: 1.89 LBS Type: Hydraulic Steering Fluid Condition: New Unit Of Measure: EA Alternate Products SKU: "770891", "HA5430H" Manufacturer Part Number (MPN): HA5430H Replaces Product: 731957801029, HA5430, HA-5430H, HA-5430, 1-HA5430 Formulated to provide the best performance for your SeaStar/BayStar steering system, Perfect mix of viscosity stabilizers/anti-wear agents/corrosion inhibitors ensure max performance