Features: Converts 12/15mm thru axles hub to 9mm axles (quick release), making it suitable for normal quick release forks. Make of aluminum alloys, offering great durability and reliability. These conversion adapters is light weight and do not add unnecessary bulk to your bike. Both end is equipped with rubber O rings to effectively reduce play and vibration, ensuring fit between the adapters and hub. It allows you to convert a 15mm or 12mm thru-axles hub into a quick release system. Specifications: Component: aluminum alloys Type: 12 to 9mm/15 to 9mm Color: Black/Red Color/Gold/Silver 12 to 9mm size: about 21x12x9x5mm/0.83x0.47x0.20inch 15 to 9mm size: about 21x15x9x5mm/0.83x0.59x0.20inch Package Includes: 1pair Hub Conversion adapters note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.