The primary design purpose of the 6000psi gray smooth surface high pressure rubber hose is to withstand high pressures for the safe and effective transfer of liquids or gases. These hoses are commonly used in hydraulic systems, pneumatic equipment, liquid transfer, and other applications requiring high-pressure piping. The internal surface of our 6000psi 1/4 inch smooth gray rubber hose is very smooth, usually made of special rubber material to reduce internal friction and resistance of the fluid medium; two layers of tight and orderly steel wire braids are nested between the inner and outer rubber of the hose , to enhance the pressure resistance and structural strength of the pipeline. Thanks to the company's excellent wire braiding technology, our rubber hose has a longer service life than other high-pressure hoses, and is more stable, always providing you with reliable performance.