Specification: Color: silver, black Material: carbon steel Product Size: as shown in the detailed picture Package details: 6 x M8 bike nuts 6 x M9.5 bike nuts 6 x M10 bike nuts 12 x 10mm/0.39in bike safety washers 6 x 8mm/0.32in bike safety washers Note: Due to manual measurement, the size and weight may have a certain error. Due to the difference between different monitors, there may be a slight color difference existed.