Features: 1.Including 9 common sizes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12, to meet your different needs. 2.Used to reduce pressure and friction, prevent leakage, isolate high, loosen or disperse pressure. 3.Offers a bearing surface to fastener load distribution and resistance to abrasion. 4.Premium quality carbon steel material, antirust, anti-corrosion and durable, it has long lifespan. 5.Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt?type connection. Specification: Item Type: Flat Washer Assortment Material: 8.8-Grade Carbon Steel Surface Treatment: Oxidation and blackening Size: M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Scope of Application: Applicable to electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection. Quantity: 600pcs Including: M2 x 100PCS M2.5 x 100PCS M3 x 100PCS M4 x 60PCS M5 x 50PCS M6 x 50PCS M8 x 50PCS M10 x 50PCS M12 x 40PCS PackageList: 600 x Flat Washers