Estes B6-4 Engines (EST10021)

                    Sold In Store Only!!!   The Estes B6-4 engine is a versatile and dependable choice for launching standard-size model rockets. Designed for rockets weighing less than 4.0 ounces, it provides a solid boost with a 4-second delay for smooth parachute deployment. Ideal for beginner to intermediate rocketeers, the B6-4 delivers a balanced combination of altitude and recovery timing—perfect for educational launches, club events, or weekend flights. Includes: - 3 B6-4 Engines - 4 Starters - 4 Starter Plugs