This is an excellent hydraulic hose for use with petroleum base hydraulic fluids and with water base hydraulic fluids with in the temperature ranges agreed upon by us and the manufacture of the fluid. Meets and exceeds SAE J517 100R12 Temperature range :- 40 to 250° F Construction : Cover : Oil and weather resistant synthetic rubber Tube : Oil resistant synthetic rubber Reinforcement : Four spiral piles of steel wire wrapped in alternating directions. The working pressure rating are based on ambient temperature of 70° and will vary inversely with temperature changes.