This item is an Engine Tube for holding an A-class, B-class, or C-class model rocket engine. This item is fully Estes compatible.
January 11, 2016
I have used this to rebuild engines in a three stage rocket. It has everything you need to rebuild.
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For use in a BT-50 Body Tube (sfr803115), requires 2 centering rings (sfr825022) for centering the Engine Tube in the Body Tube.