Features Stable Performance: The flat washer and spring gasket kit are used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. It provide stable protection for the surface of the connected parts. Various Sizes Available: This metal washer kit come with washers in 5 sizes to meet your different needs. Premium Stainless Steel Material: These gaskets are made of stainless steel material, rustproof and anti-corrosion, firm and durable. Product Features: The elastic washer is processed by professional manufacturing, it has precise design, waterproof and dust prevention. With Plastic Box: The included plastic box has multiple compartments that keep these washers sorted by size and allow you to easily find the proper one. Specification: Item Type: Washer Material: Stainless Steel Quantity: 500pcs Package List: 50 x M1.6 Flat Washer 50 x M2 Flat Washer 50 x M2.5 Flat Washer 50 x M3 Flat Washer 50 x M4 Flat Washer 50 x M1.6 Spring Washer 50 x M2 Spring Washer 50 x M2.5 Spring Washer 50 x M3 Spring Washer 50 x M4 Spring Washer Package List