Feature:1. High Quality Aluminum: These aluminium flat washers have excellent resistance to high temperature, high humidity and oxidation as well.2. 9 Common Sizes: While preventing screws from sliding and tearing, it's highly compatible with various nuts and bolts to meet all your needs.3. Exquisite Workmanship: Designed to have sturdy structure and smooth surface, the washers are not easy to deform, very durable for long use.4. Wide Application: Suits perfectly for indoor decoration, outdoor construction, electrical maintenance, household electrical appliances, and so on.5. Storage Box: All washers are sorted by size and placed in a sturdy transparent storage box to prevent loss and mixing, very convenient to use.Specification:Item Type: Flat WasherProduct Material: AluminiumQuantity: 200pcsFunction: Suitable for indoor decoration, outdoor construction, electrical maintenance, furniture maintenance, and electrical connection for household and commercial electrical appliances, automobiles and ships that use thread and bolt connection for power supply. Flat Washer Specification: 5 x 9 x 1mm / 0.2 x 0.35 x 0.04in6 x 10 x 1mm / 0.24 x 0.39 x 0.04in6 x 12 x 1mm / 0.24 x 0.47 x 0.04in8 x 12 x 1mm / 0.31 x 0.47 x 0.04in8 x 14 x 1mm / 0.31 x 0.55 x 0.04in10 x 14 x 1mm / 0.39 x 0.55 x 0.04in12 x 16 x 1mm / 0.47 x 0.63 x 0.04in12 x 18 x 1.5mm / 0.47 x 0.71 x 0.06in14 x 18 x 1mm / 0.55 x 0.71 x 0.04in.Package List:30 x 5x9x1mm Flat Washer30 x 6x10x1mm Flat Washer20 x 6x12x1mm Flat Washer20 x 8x12x1mm Flat Washer20 x 8x14x1mm Flat Washer20 x 10x14x1mm Flat Washer20 x 12x16x1mm Flat Washer20 x 12x18x1.5mm Flat Washer20 x 14x18x1mm Flat Washer