This nipple meets the standards for ASTM A53 Type F Grade A, has a length of 12 inches, a maximum operating pressure of 1000 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 3½ inch outside diameter, 3 1/16 inch inside diameter and is Schedule 80, with 0.297 inch wall thickness.