Insert Application Air Non-Potable Water Compatible Fitting Connection Type Compression Compatible Tube Outer Diameter 5/16 in Compatible Tube Inner Diameter 1/4 in Fitting Material Brass Maximum Operating Pressure 300 psi Maximum Operating Temperature 250 Degrees F Overall Length 1/2 in Specific Fitting Shape Tube Insert System of Measurement Imperial Standards NSF/ANSI 61 Annex G Compatible Tube Material Aluminum Copper Thermoplastic Minimum Operating Temperature 65 Degrees F