Insert Application Air Air Brake Compatible Fitting Connection Type Compression Compatible Tube Outer Diameter 3/8 in Compatible Tube Inner Diameter 1/4 in Fitting Material Brass Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Overall Length 25/32 in Specific Fitting Shape Tube Insert System of Measurement Imperial Standards DOT FMVSS 571/186 SAE Insert Diameter 43/200 in Minimum Operating Temperature 40 Degrees F Package Quantity 10