Hydraulic hose is rated for pressure, temperature and fluid compatibility. Hoses are used in applications where pipes or tubes are not suitable, often to provide flexibility for machine operation or maintenance. The hose consists of numerous rubber and steel wires. Hydraulic hoses usually have steel fittings forged at the ends. The weakest part of the hydraulic hose is the connection of the hose to the fitting, so correct connection selection and installation is essential in high pressure applications.