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> Estes B4-4 Standard Engine (3)
Estes B4-4 Standard Engine (3)
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The Estes B4-4 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 3.5 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.
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