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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

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10.5/5 Centering Rings

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

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5/20 Centering Rings

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

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20/50 Centering Rings

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

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20/50 Long Centering Rings

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

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50/55 Centering Rings

Centers T-50 Tube into T-55 Tube

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24/29 Long Centering Rings

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

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29/38 Long Centering Rings

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

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Centering Ring/Engine Block Combo Pack

Combo pack of five sizes of centering rings

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What's New

12/05/2022 - Holiday Shipping
If you are looking for gifts for the holidays, we suggest you order as early as possible (like maybe now)! More details... Details...
12/02/2022 - December Specials Updated
Check out the great deals for this month! Details...
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...
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