eRockets exports to Canada

eRockets ships motors via USPS Parcel Select Only - This ground service does require extra time to deliver.

  • Secure Payments

    We never see your card number ever!

  • Fast Processing

    Everything ships out the same or next day

  • Safe & Secure

    Best Security System

  • Amazing Selection

    More than anyone of Earth

Semroc Centering Rings Fiber ST-7 to ST-20(2 pieces set with engine hook slot) SEM-CR-7-20EH *

In stock
(0) Write a Review
Ships same or next day
Calculated at Checkout

Product Description

Semroc Centering Rings Fiber ST-7 to BT-20(2 pieces set with engine hook slot)   SEM-CR-7-20EH

Laser-cut fiber rings which center an ST-7 motor tube inside an ST-20 tube

Especially useful for making a standard engine mount for ST-20 rocket bodies

Requires one set of two rings

Thickness is 0.05" (.127cm)

ID= 0.759" (1.927cm)

OD= 2.042" (5.18cm)

Made in the USA


Warranty Information

Warranty for 1 year from manufacturer defects