Retaining Ring Assortment,550 pcs,Inch, System of Measurement Inch, Ring Type Housing Ring, Material Steel, Finish Black Phosphate, Material Grade/Class Ungraded, Number of Pieces 550, Number of Sizes 22, Location Style Internal, Made in North America No, Manufacturer Location Globally Sourced, Standards DIN471, DIN472, Material Quality Standards ASME B18.27.1