Note: the color of the product is randomly delivered. If there is a specific requirement for the color of the lid, please contact me. Thank you for your support B543-2RS B543 397508 HD169 MAX headset replacement bearing ( 39.7x50.8x7.14mm ) repair bearing bicycle bearingSize: Inner diameter is 39.7mm Outer diameter is 50.8mm Thickness is 7.14mmwindow.adminAccountId=230998786.Item specifics:Material: SteelModel number: B543-2RS B543 397508 HD169Structure: EccentricTorque capacity: 1Surface roughness: Ra 0.8Coatings: steelPackage weight: 0.07kg (0.15lb.)Package size: 1cm x 1cm x 1cm (0.39in x 0.39in x 0.39in)