Application specific designs make for easy installation. All Motorcraft Tube designs undergo rigorous lab and real world tests in order to meet Ford engineering standards. High quality materials are designed to help withstand vibration extreme temperatures and harsh chemicals as well as cracks damage and leakage. Tubes must pass tests for resistance to static and dynamic pressure burst pressure and temperature extremes. Burst testing subjects the lines to over 1 750 PSI to help ensure hose and fittings integrity when subjected to high temperatures. A/C lines are leak tested to measure refrigerant loss over one year. Vibration tested to detect unwanted resonance noises. Tubes must pass 1 000 hour leak tests to help ensure corrosion resistance. Flexible tube sections are reinforced with braided polyester for added strength. Foam insulators help protect against chafing and possible under hood rattles. A/C Tubes include fittings O rings seals and insulators are included as applicable. Hard lines are pre bent to fit and mounting brackets are included where applicable. Backed by the Motorcraft Service Parts Warranty which offers 2 years unlimited mileage limited labor cost and no commercial exceptions. Warranty is supported nationwide by Ford/Lincoln dealers and Ford Authorized Distributors. The only parts recommended by Ford Motor Company for Ford Lincoln and Mercury vehicles Motorcraft Hydraulic Tubes and Lines are engineered to provide original equipment performance and reliability. All Motorcraft parts undergo rigorous lab and real world tests in order to meet strict Ford engineering standards.