Made from 420 high-carbon stainless Tier-1 steel. Laser cut, never stamped. Each rotor is individually heat-treated and double-disc parallel ground to ensure perfect-flatness. WAVE design allows for lower operating temperatures at extreme conditions. WAVE design is much lighter than a stock rotor. For maximum braking performance and longevity, Galfer recommends using Galfer brake pads with Galfer rotors..