This right and left hand nipple meets the standards for ASTM A733, ANSI B1.20.1, has a length of four inches, a maximum operating pressure of 150 psi @ 150 Degrees F and is designed for the following applications: air, gas, non-potable water, oil, steam. It is made of B-grade steel with a black anodized finish/coating. In addition, it has 35/64 inch outside diameter, 19/64 inch inside diameter and is Schedule 40, with 0.119 inch wall thickness.