The propellers are made from glass-fibre-reinforced nylon material and are incredibly strong. Neutral colour for every model. Approximate values are specified for each of the motors so that propellers can be selected. Exceptionally high strength Glass fiber reinforced polyamide Aerodynamically favorable profile with high efficiency Optimal utilization of engine power over the entire speed range High tensile strength Excellent torsional stability Low air screw noise High speed Red trace color, important for the recognizability of the rotating air screw