Quality Premium Quality: Copper sealing washers are made from high quality copper to ensure good corrosion resistance, high melting point, excellent electrical conductivity and excellent thermal conductivity, strong and durable. All copper washers are manually inspected to eliminate defective products and achieve a higher level of quality. Excellent portability and classification: The sealing washers are contained in a very practical, compact compartmentalized plastic case and transparent. They allow you to classify all kinds and have a separate storage space for each size. Wide range of use: Ideal for sump plugs, water fittings, fuel fittings and hydraulics. The sump plug cleaning kit is suitable for all types of engines, such as cars, marine vehicles, generators, machinery and installations. And even in car engines, HVAC systems, aircraft landing gears and many other systems, which ensure that the copper gasket is suitable for various requirements. Multi-function :The copper gasket set can be used with nuts and bolts and provides a larger contact surface to prevent the nut or bolt head from tearing through the material being fastened. Specifications: Material: Copper Color: as shown Feature: - Assortment of copper washers with high conductivity and corrosion resistance. Great for sump plugs, water, fuel and hydraulic fittings . Perfect for household and commercial appliance, automotive and marine electrical connections. Size: M5 x9 x 1.30pcs M6 x10 x 1.30pcs M6 x12 x1.20pcs M8 x12x1.20pcs M8x14x 1.20pcs M10x14 x1.20pcs M12 x16x1.20pcs M12x18x 1.5.20pcs M14 x 18x 1.20pcs Scope of delivery: 200 * Copper flat washer with a plastic box