Galfer USA Wave Rotor Rear Kawasaki Ninja Features: Laser cut from a unique high-carbon 420 stainless steel that has been pre-heat treated and parallel double disc ground to assure perfect uniformity and balance Rotor seamlessly replaces the stock unit without any modifications Wave rotors will improve the lever feel and feedback allowing the rider to get a much stronger and progressive brake than other units would (added trailing edge on the brake pad surface) Ideal for street and track use, this rotor is for the rider that wants more than what the stock brake system can provide Precision made in Spain