Inspire 2 - Quick Release Propellers (High-Altitude)

Including a pair of propellers, one clockwise replacement propeller and one counter-clockwise replacement propeller.
The Quick Release Propellers (for high-altitude operations) improve the performance of the Inspire 2 at high-altitude (2500-5000m) locations. 
A larger propeller pitch increases the aircraft's propulsion force at altitudes with thinner air.