001602 - B4-4 Engines Description
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, 3 igniters and 4 igniter plugs.
Ages 10 and up only
Adult supervision for those under 12
To be used only with Estes model rocket products
Can be shipped only in the continental United States.