200pcs Solid Copper Washer Set, 9 Size Metric Sealing Washers Assortment Gasket Hardware Accessories Kits Round Sump Plug with Box

【High-quality copper】Solid copper has high conductivity, heat resistant and high voltage resistance. Ideal for sump plugs, water, fuel and hydraulic fittings. 【Function】Flat washers can spread a load, and prevent damage to the surface being fixed, and insulate steel screws from surface. Reduce friction, prevent loosening or dispersing pressure. 【Size and quantity】Copper washer set contain 200Pcs/9 Sizes（M5 M6 M8 M10 M12 M14）of the most commonly used copper washers. 【Perfect box】O Ring Copper washers are neatly packed in a plastic box for storage and easy carrying. 【Application】Copper washers are perfect used for electrical connections, such as household, commercial appliances, automotive, marine, generators, machinery and plant.