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Amazon.com: 5 inch drone props
Amazon.com: drone propellers
Walkera Rotor Blades Propeller Blades for 20-Piece Set of 5 Premium Copter Drone Carrera RC Video One Quadcopter 55 mm of MR. Male Model®: Amazon.de: Toys & Games
Amazon.com: drone propellers
Amazon.com: 6 inch propellers
Amazon patents drones with telescoping legs and foldable propellers - GeekWire