Estes B6-4 ENGINE BULK PACK

Estes model rocket engine bulk packs are available in four total impulse ranges: ?«A (mini engine), A, B or C (standard engines). These packs may be used for the rocket bulk packs or other Estes rockets. Whether you are launching rockets at school with students, at a youth group activity or rocket club monthly launch, Estes engine bulk packs are a must.