The Grainger Approved Black Pipe Nipple is made from carbon steel and has National Pipe Thread ends. It is available in sizes ranging from 1/8 inch to 2 inches diameter, and lengths from 1 inch to 12 inches. The nipple has a working pressure of 850 PSI at 70°F and is compatible with Schedule 40 black pipe and fittings. It can be used in steam, air, gas, or water applications. The nipple is zinc coated for corrosion resistance.