Inner tube:Oil resistant synthetic rubber Reinforcement :Four altemating layers of spiral high -tensile steel wire Cover:Environment resistant synthetic rubber Temperature Range:--40�°F to 250�°Fï¼?-40â?? to 121â??ï¼? Working pressure: 28Mpa Surface:Wrapped cover or smooth cover Application: Very high pressure applications used for petroleum-based hydraulic fluids Surface:Wrapped cover or smooth cover Color:Black