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Rotors for 6 mm helicopter models are often made of metal, which can easily get out of shape and ruin the appearance of your "bird." These replacement rotors are made of strong and flexible nylon and retain their shape, even under the harshest wargaming conditions.
They represent a rotor 36 feet in diameter, the sprue has six rotors. They are inside a "cage" to protect them.
Blades can be easily trimmed with a sprue cutter if a smaller rotor is required and still retain realistic proportions. A tiny hole in the center of the hub allows easy mounting with a straight pin or length of rod.