The Yuneec Propeller Set B for Q500 Typhoon / Typhoon G Quadcopter contains two counterclockwise (CCW) rotating props for installation right front and left rear. Note: While these propellers will work with all Q500 Typhoon models as well as the Typhoon G, the propellers must be paired with the CCW version of the same model: i.e., YUNQ4K115B. This is because the profile of each propeller differs slightly.