[Quality Aluminum]Aluminium flat washers, high hardness, not easy to rust, non-deformation, wear - resistant and corrosion resistant [BRUSHED SURFACE]surface brushed treatment, surface could reduce friction between fasteners; seal tight prevent leakage, isolates, prevents loosening or dispersion pressure. [LIGHT WEIGHT BIG VALUE]Aluminum durable washers, light weight/wear resistance, corrosion resistant. Suitable for automotive or electrical applications such as oil lines, hydraulic fittings, oil drain [FEATURES] Not easy to rust, good tensile strength, moisture-resistant, oxidation resistant; no pollution, non-toxic, no pollution; fine workmanship, well-constructed pieces, corrosion resistant, acid, and corrosion resistance. Tighter seal they perform compare with rubber washers. colour:silver Material:Aluminum alloy Package Contents: 45 x M6 x 10 x 1mm Flat Washer 45 x M6 x 12 x 1mm Flat Washer 45 x M8 x 12 x 1mm Flat Washer 45 x M8 x 14 x 1mm Flat Washer 40 x M10 x 14 x 1mm Flat Washer 40 x M10 x 16 x 1mm Flat Washer 20 x M12 x 16 x 1mm Flat Washer 20 x M12 x 18 x 1.5mm Flat Washer 20 x M14 x 18 x 1.5mm Flat Washer 20 x M14 x 20 x 1.5mm Flat Washer 20 x M16 x 20 x 1.5mm Flat Washer 20 x M16 x 22 x 1.5mm Flat Washer 20 x x 20 x 1.5mm Flat Washer 20 x x 24 x 1.5mm Flat Washer 20 x M20 x 26 x 1.5mm Flat Washer 10 x M22 x 27 x 1.5mm Flat Washer 10 x M22 x 29 x 2mm Flat Washer 10 x M24 x 29 x 2mm Flat Washer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.