Size Name: M6x1mm, 10pcs | Color Name: Blue 1.Thin Knurled Thumb Nut This is a carbon steel flat air box cover knurling nut. 2. Round nut with knurling is easy to assemble and disassemble. You can quickly open and close the airbox cover by hand without any tools. 3 Quality carbon steel material, zinc plated finish, corrosion resistant. Specifications: Material: Carbon Steel Finish: Blue Galvanized Thread Size: M6 x 1 mm Outter Diameter: 0.8 inches (20 mm) Height: 0.24 inches (6 mm) Package Contents: 10 x Kurled Nuts