The 100761608 Mitered 90 Degree Elbow Fitting is made with 304 stainless steel and has a size NW80 ISO-MF vacuum flanges on each end. 90 degree elbow are used to make a right angle change of direction between two ISO-MF flange faces.  Applications ISO universal components include roughing and foreline plumbing, high-vacuum, high-conductance interconnections, modular systems needing frequent modifications, and research laboratories.