100% brand new and high quality Features: Steel + Aluminum radiator fin technology combines the high heat dissipation capacity of aluminum and high strength of steel, Increased rea heat dissipation, better heat generation in the braking system, resulting in a significant improvement in braking performance. The temperature drops 25% compared to normal rotors under the same conditions. Durable and light-weight, easy to install. Bike Disc Brake only,other accessories demo in the picture is not included. Specification: Material: Steel + aluminum heat sink Specification: app.16cm/6.30in Hole Distance: app.4.4cm/1.73in Thickness: app.0.18cm/0.07in Optional Color: Black, Silver Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls 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! Package Contents: 1 x Bike Disc Brake