Cat hoses are designed to route liquids and gases through machine systems. These hoses are fabricated from superior materials to withstand application-specific pressures, vibration tolerances, and flow requirements for Cat heavy-duty equipment. Cat hydraulic hose and couplings are subjected to the most rigorous testing processes in the industry. Every Cat hose and coupling combination is tested as a system to ensure a perfect fit that yields maximum safety and dependability.The construction of the hose is made from an oil-resistant synthetic rubber inner tube with one braid of special high tensile steel wire reinforcement. The outer cover is an oil and weather-resistant synthetic rubber cover.