Includes 8 Most Used Sizes: M2 M2.5 M3 M5 M6 M8 M10 Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment. All of Washers Will Be Packed in A Sturdy Transparent Plastic Case, Can Be Use for A Storage Box Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection Washer Type: Spring Lock Washers colour:Silver material:304 stainless steel Package Contents: 60 * M2 Spring Lock Washers 40 * M2.5 Spring Lock Washers 60 * M3 Spring Lock Washers 55 * Spring Lock Washers 60 * M5 Spring Lock Washers 55 * M6 Spring Lock Washers 55 * M8 Spring Lock Washers 25 * M10 Spring Lock Washers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.