Description: The product has a rubber ring on both sides, which can reduce the shaking and play a protective role, so that the tightness between the installed barrel shaft and the hub is higher, and 4 spare rubber rings are distributed. Made of 7075 aluminum alloy material, light weight and high strength. It is possible to convert the barrel shaft hub to a quick release. Full CNC machining with high precision. Surface anodizing treatment, it is not easy to fade. Specification: Name: Hub Conversion Axis Material: 7075 Aluminum Alloy Color: Black, Red(As Picture Shown) Weight: 36.4 grams Size: Approx. 122x110x15mm/4.8x4.33x0.59inch Suitable for 110mm Bicycle Opening Specifications: 15 to 9 for 110MM Hub Opener Package Includes: 1 Piece Conversion Axis 4 Pcs Spare Aprons Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size.