B4-4 Rocket Engines

A2Z Science & Toys Verified independent store

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**For local delivery only - we cannot currently ship rocket engines.** The Estes B4-4 engine is single stage engine designed for model rocket flight. This engine is a standard engi ne designed for flights in rockets weighing less than 3.5 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs. Show more