Kits YOU Build!

Model Rocket Centering Rings and Engine Blocks (Spiral Wound Paper)

Model Rocket Centering Rings are used to center a smaller tube (often an engine mount tube) inside a larger diameter tube. These rings are made from spiral-wound paper. Most are designed to be used in pairs. Some sizes of Centering Rings are also used as Engine Blocks in motor mounts.

MM/10.5 Centering Rings

Centers MicroMaxx (T-MM) Tube into T-10.5 Tube

View Details »

10.5/5 Centering Rings

Centers T-10.5 Tube into T-5 Tube also can be used as a 13mm Engine Block

View Details »

5/20 Centering Rings

Centers T-5 Tube into T-20 Tube also can be used as an 18mm Engine Block

View Details »

20/50 Centering Rings

Centers T-20 Tube into T-50 Tube also can be used as a 24mm Engine Block

View Details »

20/50 Long Centering Rings

Centers T-20 Tube into T-50 Tube also can be used as a 24mm Engine Block

View Details »

50/55 Centering Rings

Centers T-50 Tube into T-55 Tube

View Details »

24/29 Long Centering Rings

Centers T-50 (24mm) Tube into T-29 Tube also can be used as a 29mm Engine B...

View Details »

29/38 Long Centering Rings

Centers T-29 (29mm) Tube into T-38 (38mm) Tube

View Details »

Centering Ring/Engine Block Combo Pack

Combo pack of five sizes of centering rings

View Details »

What's New

11/20/2022 - New delays on 13mm A engines now available!
Estes A3-2T & A3-6T engines now in stock! Details...
11/09/2022 - New Shepard Builders Kit Now in Stock
New semi-scale kit of the Blue Origin New Shepard launch vehicle from Estes. Details...
11/05/2022 - New Conformal Rail Guides for T-70 and T-80/2.6 size tubes are now in stock.
The guides are 3D printed and designed to fit standard 1010 size rails. Details...
11/03/2022 - November Specials Updated
Check out the great deals for this month! Details...
View all news items

Testimonials

I appreciate your help and enjoy dealing with a company that treats its customers the way yours does. - Frank S.

View all testimonials