Features: brand new and high quality Inclined concave‑convex design, high degree of fit, stable structure, strong fastening force and high stability, which can be reflected in the process of high‑intensity riding. The concave‑convex pad surface of the gasket is colored by vacuum coating, and a coating is formed on the surface of the gasket, which strengthens the surface hardness and makes the gasket not easy to fade. This concave‑convex spacer is suitable for disc brake calipers, high strength, good mechanical properties, toughness and corrosion resistance. This screw is specially designed for bicycle,for brake caliper. Lightweight and weight reduction, the density of for titanium is very low, but the hardness is great, and the strength is higher. Ultra light, professional design, will fits your bicycle perfectly. This bike disc brake caliper spacer use alloy material, high strength, PVD coating coloring, fine workmanship, new structure, high strength, and strong stability, high intensity and durable, rust resistance. Specifications: Material: Alloy Color: Black Package Weight: approx.3g Size: Convex: Diameter: Outer: approx.12mm(0.47in) Inner: approx.8mm(0.32in) Concave: Diameter: Outer: approx.9mm(0.35in) Inner: approx.6.2mm(0.24in) Thickness: approx.0.3mm(0.01in) Package Includes: 1 Pair x Bike Brake Spacer note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!