401-16 Merrit Brass T304 1" Stainless Steel 90° Elbow The Merit Brass stainless steel 304 cast pipe fitting is a 90-degree elbow with Female National Pipe Taper (NPT) threads and is used to change flow direction between two pipes.90-degree elbow for changing flow directionFemale National Pipe Taper (NPT) threads for connecting two pipesMade of stainless steel 304 for strengthLower carbon content for greater resistance to corrosionClass 150 fittings conform to standards ANSI B1.20.1 and ISO 49 for quality assurance