Fastpipe O-Ring/Bite Ring Fitting Material Buna N Maximum Operating Pressure 190 psi Maximum Operating Temperature 140 Degrees F Overall Length 40 mm Specific Fitting Shape Fastpipe Spare Parts Kit Compatible Tube Outer Diameter 40 mm Color Black Compatible Tube Hardness 25 Shore Compatible Tube Material Aluminum Compatible Tube Wall Thickness 0.06 in Minimum Operating Temperature 0 Degrees F Resistance Properties Corrosion-Resistant