Description: High Quality Material: Made of high quality alloy, anti-rust, non-deformation and durable. Anti-peeling: The screws are equipped with anti-peeling adhesive. Flange Adapters: With this adapters, you can change 100x15mm front hun into 110x15mm, and 142x12mm rear hub into 148x12mm. Easy to Install: Exquisite workmanship, feeling fine, easy to use, easy to install and use. Specification: Material: Alloy Color: As Picture Shown Options: for Front ; for Rear Fit for 100x15mm to 110x15mm(for front), 142x12mm to 148x12mm(for rear) Size Chart: Front Hub Size: Ringlet Inner Diameter: Approx. 15mm/0.59inch Hub Thickness: Approx. 5mm/0.2inch Rear Hub Size: Ringlet Inner Diameter: Approx. 12mm/0.47inch Hub Thickness: Approx. 3mm/0.12inch Package Includes: Front/Rear Hub Includes: 1 Piece Bike Hub 2 Pieces Ringlets 6 Pieces Screws Front Rear Set Includes: 2 Piece Bike Hubs 4 Pieces Ringlets 12 Pieces Screws(2 Pack) 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.