Features Size: M2 M2.5 M3 M4 M5 M6 M8 M10, a total of 360 pieces, 8 common sizes for your choice, different sizes can meet your different needs. Material: The gasket is made of brass material, compared with steel and rubber gaskets, copper has the characteristics of high temperature resistance, high conductivity, tighter sealing and extremely durable. Features: A combination of highly conductive, corrosion-resistant copper washers for oil pan plugs, water, fuel and hydraulic fittings to protect connecting surfaces from damage, flat washers are used to reduce friction, prevent leakage, isolate, prevent loosening or dispersing pressure. Application: Widely used in electrical connections of household and commercial appliances, automobiles and ships, and can be used to reduce friction, prevent loosening or disperse pressure, and provide stable protection for the surface of connecting parts. Packaging: The included plastic box has multiple compartments to sort these gaskets by size, making it easy to find the right fit. All contained in a compact clear compartment plastic box for easy access. Features: 1.The flat washer is used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. 2.Provides stable protection for the surface of the connected parts. 3.These gaskets are made of brass material, rustproof and anti-corrosion, firm and durable. 4.This kit come with washers in 8 sizes to meet your different needs. 5.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: Brass Quantity: 360pcs Package List: 60 x M2*5*0.4 Washer 60 x M2.5*5*0.4 Washer 60 x M3*7*0.5 Washer 60 x M4*9*0.8 Washer 40 x M5*10*1 Washer 40 x M6*12*1 Washer 20 x M8*16*1.2 Washer 20 x M10*20*1.2 Washer  Package List