This union tee meets the standards for CA-377, QQ-B 626 Alloy 377, ASTM-B-124 Alloy 377, BS2872 CZ122, has a length of 2 13/32 inch, a maximum operating pressure of 6,600 psi and is designed for the following applications: gas, oil. It has an operating temperature of 40 Degrees F to 400 Degrees F, is resistant to corrosion and is made of brass. In addition, it is a tee, with an imperial system of measurement. Plus, it has a ⅝ inch hex size.