- "Mini" class model rocket engine 4 pack.
- Single stage model rocket motor.
- Detailed instructions.
- Easy to use.
- National Association of Rocketry certified.
![]() | 1/2A3-4T MINI Model Rocket Engine (4) Other items from Estes Rockets This is a 1/2A-class 1/2A3-4T single use mini model rocket engine from Estes. For use in single stage model rockets. |
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