Stainless Steel 316 Cast Pipe Fitting, Union, MSS SP-114, 1/8" NPT Female Union for connecting and extending two pipes Female National Pipe Taper (NPT) threads on both ends for connecting two male threaded pipes Made from stainless steel 316 for strength Higher corrosion resistance than stainless steel 304 Meets standards MSS SP-114, ANSI B1.20.1, and ASTM A351 for quality assurance