This propeller is perfectly matched to the Vittorazi Moster and is also “Vittorazi Approved”, so your warranty on the motor remains valid when using this propeller. This propeller is perfect for combining a medium-sized frame with the Power of the Moster Engine whilst the specific profile of this propeller ensures adequate cooling of the engine at all times. This propeller is by far the most sold on this engine and tens of thousands of pilots rely on this one.