This is Master Airscrew’s Fiberglass-Filled 12×6 3-Blade Nylon Pusher Propeller. FEATURES Suitable for any application from training and sport flying to serious competition Factory-balanced 3-blade prop has NACA airfoils and holds true pitch Accurately balanced to create a greater thrust at lower RPM Constructed of glass-filled nylon INCLUDES 12×6 glass-filled nylon 3-bladed pusher propeller