This is the Standard Engine Mount Kit by Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Regular engine mounts
Easy to assemble with complete insturctions
Kit fits BT-50, 55 and 60 tubes
20/55 laser cut centering ring set
20/60 laser cut centering ring set
20/50 adapter ring
20/50 split adapter ring
Engine hook retainer rings
Engine mount tubes
Due to small parts that could cause a choking hazard please keep
away from children 3 years of age and younger
For your safety and enjoyment, always follow the NAR Model Rocketry
Safety Code while participating in any model rocketry activities