Sealing Washer, Finish Plain, Metal Material Copper, Material Grade/Class Not Applicable, For Screw Size M 12.5, Inside Diameter 12.5 mm, Outside Diameter 20 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 +/- 0.2 mm, Package Quantity 50