This nipple meets the standards for ASTM A53/A733, has a length of 7½ inch, a maximum operating pressure of 300 psi @ 150 Degrees F and is designed for the following applications: air, gas, non-potable water, oil, steam. It is made of Grade A-grade steel with a black anodized finish/coating. In addition, it has 2⅜ inch outside diameter, 2 1/16 inch inside diameter and is Schedule 40, with 0.141 inch wall thickness.