Sealing Washer Finish Plain Metal Material Copper Material Grade/Class Not Graded For Screw Size M9 Inside Diameter 9 mm Outside Diameter 14 mm Maximum Thickness 1.5 mm Seal Material Copper System of Measurement Metric Pack Size Small Pack Heat Treatment Annealed Minimum Thickness 1.5 mm Thickness Tolerance +/-0.20 mm Package Quantity 100