Features1Material: Using aluminum alloy bracket and stainless steel outer ring, the disc brake rotor is sturdy and durable. 2Processing: Full CNC engraving, milling, stamping and forming, no abnormal noise when braking. 3Easy to Install: Standard 6 hole installation, core diameter is 44mm / 1.7in, the floating disc brake rotor is easy to install and use. 4Bright Colors and High Hardness: The electroplating process is colored, the colors are bright and anti oxidation, giving you a different riding experience, the stamping molding makes the bicycle rotor with high hardness and the thickness is about 1.8mm / 0.1in. 5Widely Used: Suitable for road bike and mountain bikes, suitable for disc brake systems with 6 bolt hubs.SpecificationItem Type: Bike Disc Brake RotorMaterial: Aluminum Alloy Bracket + Stainless Steel Outer RingProduct Color: Plating ColorThickness: Approx. 1.8mm / 0.1inCore Circle Diameter: 44mm/1.7inProduct Weight: Approx. 231g / 8.1ozProcess: Full CNC engraving and milling, electroplating and coloring, stamping and forming, corrosion resistance, not easy to rust.Package List1 x BikeDiscBrakeRotor6 xBolts