US Patent 6,386,340Laser cut from a unique high-carbon 420 stainless steel that has been pre-heat treated and parallel double disc ground to assure perfect flatnessWave 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)Rotors sold individuallySport bike front rotors are full-floating with an aluminum center carrierGalfer Brakes Part #: DF188W