This two engine combo pack is to be used with two stage rockets. The B6-0 is a booster engine that has no delay or ejection charge. The B6-6 is the upper stage engine. Estes engine bulk packs are convenient and include everything your students need to prepare their rockets for launching.

Estes model rocket engine bulk packs are available in four total impulse ranges: ½A (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.

The B6-0/B6-6 Engine Bulk Pack comes with all the rocket engine supplies you need to launch 12 rockets. Included are 24 rocket engines (12 of each engine), 30 model rocket starters, 24 reusable starter plugs and 75 squares of recovery wadding.