Item No NVK-5941 Description This is the replacement sintered rotor for Novak's Ballistic Racing Brushless Motors (#3603, 3604, 3605, 3607 ). It is also compatible with other Novak 540-size motors that have an oversized front bearing. The Ballistic Sintered Rotor replaces the Velociti Sintered Rotor (#5908) for Novak¡¦s Velociti-series and SS Pro-series of brushless motors. Features: High-strength sintered, Neodymium magnet for maximum motor acceleration, braking power and performance in high temperature conditions Nickel-plated for stronger surface and resistance to corrosion Meets ROAR & IFMAR specifications Novak designed Specifications: Diameter: 12.3 mm Output Shaft: 1/8 inch (accepts all existing pinion gears) Weight: 27.5 g (0.97 oz) Maximum Operating Temperature: 200ºC (392ºF)*   Includes: Rotor in a protective tube Installation instructions