Estes BT5-BT55 Centering Rings (26)Tower Stock# ESTT3175 • Manufacturer Stock# 3175
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Perfect for making your own engine mounts
Assortment of BT5-BT55 Centering Rings
Due to small parts that could cause a choking hazard please keep
For your safety and enjoyment, always follow the NAR Model Rocketry