This 2170R Folding Propeller Kit from DJI is designed for your Matrice 600-series Hexacopter. The kit includes two propeller blades: one clockwise (CW) and one counterclockwise (CCW). Each blade is 21″ in diameter and is made of Ultra Carbon Pro, a material that provides low rotational inertia as well as high strength and stiffness. The propellers’ aerodynamic profiles also help make the Matrice 600’s propulsion system more energy efficient. Propeller adapters and screws are included.