This nipple meets the standards for ASTM A733, has a length of 2½ inches, a maximum operating pressure of 300 psi @ 150 Degrees F and is designed for the following applications: air, natural gas, non-potable water. It has an operating temperature of -20 Degrees F to 350 Degrees F, is made of B-grade steel. In addition, it has 1 29/32 inch outside diameter and is Schedule 40, with 0.145 inch wall thickness.