Description: *Brand new and high quality *Made of high-quality materials, *Used to replace old bike part，for MTB bikes ,hubs series motors *design for fixed gear bike hubs *easy to use and install，good compatibility Specifications: type: screw Color: dark silver size: M 9, M10, 3/8 weight：20G Package included: 2PCS screw Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Compatibility - 2PCS bikes crew nut bicycle screw M9 M10 3/8 screw nut for bike hub Good Performance Materials - These bike accessories are made of premium material, ensuring their durability and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability to different cycling needs and provide optimal performance and reliable functionality enhance the riding experience and ensure safety. Easy Installation - These accessories can be easily installed on your bike to get your bike running again. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.