Stainless Steel 304 Cast Pipe Fitting, 90 Degree Elbow, Class 150, 1/4" NPT Female 90-degree elbow for changing flow direction Female National Pipe Taper (NPT) threads for connecting two pipes Made of stainless steel 304 for strength Lower carbon content for greater resistance to corrosion Class 150 fittings conform to standards ANSI B1.20.1 and ISO 49 for quality assurance