Novak 5954 Ballistic 540 SmCo Tuning Rotor FEATURES: Fits all Novak 540 size brushless motors, Ballistic Racing, Ballistic Spec, Velocity Racing and SS Pro Recommended for all track application INCLUDES: 540 Ballistic SmCo 12.3mm Rotor with Instructions INCLUDES: 540 Ballistic SmCo 12.3mm Rotor with Instructions