Feature: 1. Made of quality materials, high strength, anti-rust, non-deformation and practical. 2. Fine workmanship makes the surface smooth and can prevents abrasion damage. 3. Easy to install and use. 4. Suitable for use when the six-pin disc is installed in the center lock hub. 5. Auminum alloy, wear resistant for long lifespan. Specification: Install on the center lock hub to enable it to install a six-pin disc. Features: Made of quality materials, high strength, anti-rust, non-deformation and practical. Fine workmanship makes the surface smooth and can prevents abrasion damage. Easy to install and use. Suitable for use when the six-pin disc is installed in the center lock hub. Auminum alloy, wear resistant for long lifespan. Specifications: Color: red, blue, black, yellow (optional) Material: Auminum alloy Diameter: 52 mm Thickness: 9 mm Package size: 80 * 60 * 10mm / 3.1 * 2.4 * 0.4in Package weight: 30g / 1.1ounce Packing List: 1 * Centerlock 6-hole Adapter Package List: 1 * Centerlock 6-hole Adapter