Material: Copper. High conductivity, corrosion resistant. Good electrical conductivity and thermal conductivity.</p> Contains 300 pieces/12 sizes of the most commonly used copper washers. Ideal for sump plugs, water, fuel, and hydraulic fittings.</p> Comes with a plastic box for storage. Durable copper material will last a long time.</p> Perfect for electrical connections on household and commercial appliances, automotive, and marine where the power source has a threaded/bolt connection.</p> Package includes: 300 x copper washers, 1 x plastic box.</p> Product Features:</p> Product Name: Assorted Copper Washers </p> Material: Copper.</p> Quantity: 300 pieces.</p> Quantity: 300 pieces + 1 plastic box.</p> M5 x 9 x 1 mm, 35 pieces.</p> M6 x 10 x 1 mm, 30 pieces.</p> M6 x 12 x 1 mm, 30 pieces.</p> M8 x 13 x 1 mm, 30 pieces.</p> M8 x 14 x 1 mm, 25 pieces.</p> M10 x 14 x 1 mm, 30 pieces.</p> M12 x 16 x 1 mm, 25 pieces.</p> M12 x 18 x 1 mm, 25 pieces.</p> M14 x 18 x 1mm, 20pcs.</p> M16 x 20 x 1.5mm 20pcs.</p> M16 x 22 x 1.5mm, 15pcs M20 x 26 x 1.5mm, 15pcs.</p> Package Content:</p> 1 x Washer.</p> Note: Other items are not included, the color is based on the first picture, and other pictures just show the effect.</p> Due to the differences between different monitors, the picture may not reflect the actual color of the item.</p> Due to manual measurement. Please allow deviation. Thank you!</p>Good quality product</p>