This is the 24mm Engine Retainer Set from Estes. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
For your safety and enjoyment, always follow the NAR Model Rocketry Safety Code while participating in any model rocketry activities
August 28, 2017
they work just as good as the aluminum ones and less expensive
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Due to small parts that could cause a choking hazard please kee away from children 3 years of age and younger.