Specifications: Exquisite workmanship, feeling fine, easy to use. Unique thread design, effectively and directly to make bicycle braking. Item Name: Threaded Hubs Disc Material: Aluminium Alloy Hole Distance(Optional): 48mm/1.89", 44mm/1.73" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Threaded Hubs Disc