15 sizesAll include 225pcs metric washers with sizes M3x14, M4x20, M4x25, M5x20, M5x25, M6x20, M6x25, M6x30, M8x20, M8x25, M8x30, M10x20, M10x25, M10x30, M12x24 . High Quality MaterialAll washers are made of 304 stainless steel, which has good corrosion resistance in bad environment like high temperature, cold and high humidity. They have superior rust resistance and excellent oxidation resistance. Easy to use Metal washers are very easy to install, the surface of the washing machine is smooth and can reduce friction between fasteners, prevent leaks, insulate, prevent loosening or dispersion of pressure. Scope of delivery The washers are arranged in a storage box so that you can find yourself easily in series and avoid losing them if needed. Wide Range of ApplicationsPerfect for electrical connections on household and commercial appliances, automotive and marine applications. lucky to meet