Various sizes: M2.5, M3, M4, M5, M6, M8, 6 common sizes to meet your different needs. 304 stainless steel: Selected material, corrosion resistant, stable and reliable, can be used under high temperatures, high pressure or alternating working conditions. Application: Used for electrical connections on commercial, automotive and marine appliances and household appliances. Easy to store: All washers are stored in a transparent box, convenient to sort so you can always easily find the corresponding components. External design: Serrated lock washers with external teeth, as an ideal replacement for traditional metal coated washers. Item descriptions: -Various sizes: M2.5, M3, M4, M5, M6, M8, 6 common sizes to meet your different needs. -304 Stainless Steel: Selected material, Corrosion resistant, stable and reliable, can be used under high temperatures, high pressure or alternating working conditions. -Application: Used for electrical connections on commercial, automotive and marine