Estes 10021 B6-4 Bagged Rocket Engines with Starters and Plugs (3 Pack) 1/700 Ship InterMountain 47096 HO Scale ACF

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Estes 10021 B6-4 Bagged Rocket Engines with Starters and Plugs (3 Pack) 1/700 Ship InterMountain 47096 HO Scale ACFEstes 10021 B6 4 Bagged Rocket Engines with Starters and Plugs 3 Pack 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 timingperfect for educational