This item has special shipping requirements. Please see our shipping information page for more details.This two engine combo pack is to be used with multi-stage rockets. The B6-0 is a booster engine that has no delay or ejection charge. The B6-6 is the upper stage engine. Contains 24 engines (12 of each engine), 30 igniters, 24 patented igniter plugs, and 75 sheets of Recovery Wadding. These packs may be used for some of Estes multi-stage 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.
