Description: Disc Brake Adapter: This mountain bike disc brake adapter provides stronger braking power for your rideMaterial: The disc brake caliper mount adapter is made of high strength aluminum alloy, which is sturdy and designed to withstand extensive useFine Craftsmanship: The surface of the adapter has been CNC milled and anodized to ensure its longevity and maintain a smooth appearanceGreat Accessory: A must have for cyclists, practical, can be modified into a regular bicycle disc brake bikeEasy Installation: Comes with screws, easy to install and disassemble Specification: Material: Aluminum Alloy Size Chart: 7.4cm/2.91inch Package Includes: 1Disc Brake Caliper Mount Adapter Set Note: Please allow slightly errors 1-2cm differences due to manual measurement.