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B4-4 Model Rocket Engines (3pk)
The Estes B4-4 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.
$10.79
- Stock: In Stock
- Model: EST1602
- MPN: 1602