Galfer Brakes Wave Brake Rotor DF191W Galfer's Standard Wave&reg; rotors are engineered to provide the best performance in the market. Every aspect of their design, from the materials and manufacturing processes to the extensive testing, has been carefully chosen to produce the best quality stainless steel rotor available. The Standard Wave&reg; rotor provides premium performance both on the street and at the track, and its influence in the industry can be seen in all the designs that try to copy its look. Depending on application, designed for street, track and off-road, this rotor is for the rider that wants more than what the stock brake system can provide. Every high-quality, Galfer-patented Wave&reg; rotor is made from a proprietary mix of virgin high-carbon 420 stainless steel, laser cut (never stamped), double disc-parallel ground to assure perfect parallel flatness and heat treated to each specific appl