The Estes D12-0 engine is a booster stage engine designed for model rocket flight and has to be used with a standard engine. This engine is for flights in rockets weighing less than 14 ounces, including the engines. Each package includes 3 engines, 3 starters and 4 starter plugs.
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ATTENTION: Estes products may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm