90 degree elbow. 90 degree elbow.BW Pipe fittings: Standard: ASTM/ASME/ANSI, MSS SP, DIN, JIS, GB,etc.Size: 1/2"~48" or DN15~DN1200, Sch5S~Sch160. Materials: 304, 304L, 310S, 316, 316L, 317, 317L, 321, 347, 904L, S31803/2205/F51, S32750/2507/F53, etc. 90 degree elbow