ESTES ENGINE B4-4 Standard (3)

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Item Number: EST1602This is the B4-4 Standard Model Rocket Engines/Motors from Estes.Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.FEATURESSingle stage eng ineStandard engine designed for flights in rockets weighing lessthan 3.5 ounces, including the engineEngines tested and certified by the NAREasy to use and comes with clear instructionsINCLUDESThree B4-4 EnginesThree IgnitersFour Igniter PlugsREQUIREMENTSModel rocketAdult Supervision for Children Under 12SPECIFICATIONSLength: 2.75" (7cm)Diameter: .69" (18mm) Show more