Features: Attractive design, race-proven quality and competitive pricing make Nitro the perfect OEM replacement. Like Moto-Master's Flame discs, all Nitros are made of special hardened, low-carbon stainless steel for optimal durability and maximum stopping power. Design provides maximum heat dispersion while the carefully positioned cooling slots ensure optimal brake pad cleaning action in all conditions. Designed and engineered by Moto-Master to meet the demands of modern Motocross and Enduro racing.