Includes 8 Most Used Sizes: M2 M2.5 M6 M8 M10Made of 304 Stainless Steel Material, Good Corrosion Resistance, It Can Be Used in a Humid Environment.All of Will Be Packed in A Sturdy Transparent Plastic Case, Can Be Use for A Storage BoxPerfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connectionWasher Type: Spring Lock colour:Silvermaterial:304 stainless steelPackage Contents:60 * M2 Spring Lock 40 * M2.5 Spring Lock 60 * Spring Lock 55 * Spring Lock 60 * Spring Lock 55 * M6 Spring Lock 55 * M8 Spring Lock 25 * M10 Spring Lock Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.