Feature 1Including 9 common sizes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12, to meet your different needs. 2Used to reduce pressure and friction, prevent leakage, isolate high, loosen or disperse pressure. 3Offers a bearing surface to fastener load distribution and resistance to abrasion. 4Premium quality carbon steel material, antirust, anti-corrosion and durable, it has long lifespan. 5Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolttype connection.Item Type: Flat Washer Assortment Material: 8.8-Grade Carbon SteelSurface Treatment: Oxidation and blackeningSize: M2 M2.5 M3 M4 M5 M6 M8 M10 M12Scope 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: 600pcsIncluding:M2 x 100PCSM2.5 x 100PCS M3 x 100PCS M4 x 60PCS M5 x 50PCS M6 x 50PCS M8 x 50PCS M10 x 50PCS M12 x 40PCS .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List600 x Flat Washers