Union, Tube Fitting Material Low Lead Brass, Fitting Connection Type Compression, Tube Size 5/16 in, Compression Thread Size 1/2-24, Max. Pressure 300 psi, Hex Size 1/2 in, Temp. Range -65 Degrees to 250 Degrees F, Standards NSF 61 ANNEX G. This item has been restricted from sale in the following state (s): []