Air Brake Fitting Sleeve Fitting Material Brass Maximum Operating Pressure 225 psi Maximum Operating Temperature 200 Degrees F Overall Length 1/4 in Specific Fitting Shape Sleeve System of Measurement Imperial Compatible Tube Outer Diameter 1/2 in Standards DOT FMVSS 571.106 Compatible Fitting Connection Type Compression Minimum Operating Temperature 40 Degrees F Resistance Properties Corrosion-Resistant