Description: Made of carbon steel, durable Inner diameter: 49mm Outer Diameter: 56mm Thickness: 2mm Accessories for scooter, karting Specification: Material: Carbon Steel Inner diameter: Approx. 49mm / 1.9inch Outer Diameter: Approx. 56mm / 2.2inch Thickness: Approx. 2mm / 0.0787inch Package Includes: 1 Piece Circlip Note: Please allow 1-2mm size deviation