Product Name: Cosmetic Nut Outdoor Knurling Type; Product Number: EPN-DS15R; Material: Stainless steel; Size: Seat Diameter (A): 0.6 inch (15 mm); Seat Thickness (B): 0.3 inch (8 mm) (*Effective 0.2 inch (5 mm)); Screw Diameter M6 x P1.0; Surface: VT processing (non-mirrored); Accessories: This product does not include any accessories.