Sealing Washer, Finish Plain, Metal Material Copper, Material Grade/Class Not Graded, For Screw Size M20, Inside Diameter 20 mm, Outside Diameter 24 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 25