Standard: SAE J2064 QC/T664-2005 Working temperature: -40℃-140℃ Appliable Refrigerant: R404a Dimension: 12.7mm I.D. : 12.7mm O.D. : 21.5mm Wall Thickness: 4.4mm Wall Diff Max: 0.4mm Working Pressure Max: 3.5Mpa Burst Pressure Min: 18Mpa Bend Rad Min: 85mm