Great Planes 9x6mm Power Flow Slo-Flyer Electric Propeller (2-Piece) FEATURES: Constructed of plastic, Black in color Blade ends are turned back to reduce drag and increase thrust by improving the blade lift over drag c INCLUDES: Two Great Planes ElectriFly PowerFlow 9x6 Propellers with warning sheet INCLUDES: Two Great Planes ElectriFly PowerFlow 9x6 Propellers with warning sheet