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.Cat ToughGuard™ Hose features an abrasion-resistant cover for the harshest operating conditions. It surpasses over 2 million SAE abrasion test cycles providing superior resistance against the number one cause of hose failure, abrasion.The construction of the hose is made from an oil-resistant synthetic rubber inner tube, two plies of braided wire reinforcement, and a synthetic rubber cover with a special ToughGuard film outer sheath for high abrasion resistance. A woven or braided ply of suitable material may be used over the tube and/or over the wire.