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Model Rocket Engine Designation
E12-6 Model Rocket Engines | Hobby Lobby | 567636
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B6-6 Engines - Estes Rockets
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ESTES ROCKET ENGINE E9-6 3 Pack 1674
Estes Model Rocket Motor B6-4 1606
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![Estes A3-6T Mini Rocket Engine [EST-1508] - $11.29 : Sirius Rocketry Online Store, For the Serious Rocketeer!](https://www.siriusrocketry.biz/ishop/images/EstesMiniEngine.jpg "Estes A3-6T Mini Rocket Engine [EST-1508] - $11.29 : Sirius Rocketry Online Store, For the Serious Rocketeer!")