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PCR4x2080
(image for) Centering Ring - 4xBT-20 in BT-80 (Plywood) - Model Rocket Part

Centering Ring - 4xBT-20 in BT-80 (Plywood) - Model Rocket Part

This is a plywood centering ring for centering four BT-20 body tubes or motor tubes in a BT-80 body tube.
Model: PCR4x2080
22 Units in Stock
$1.75

In Stock: 22
CR2050
(image for) Centering Ring - BT-20 in BT-50 (24mm Thrust Ring)

Centering Ring - BT-20 in BT-50 (24mm Thrust Ring)

This is a standard paper centering ring for centering a BT-20 (18mm motor) tube in a BT-50 tube. This part is often used to create an 18mm motor...
Model: CR2050
22 Units in Stock
$0.25

In Stock: 22
CR2050-L
(image for) Centering Ring - BT-20 in BT-50 (Long)

Centering Ring - BT-20 in BT-50 (Long)

A one-inch long thick paper coupler which can be used to center a standard BT-20 body tube in a BT-50 tube.
Model: CR2050-L
3 Units in Stock
$0.39

In Stock: 3
PCR2055
(image for) Centering Ring - BT-20 in BT-55 (Plywood)

Centering Ring - BT-20 in BT-55 (Plywood)

This light plywood centering ring centers a standard BT-20 body tube in a BT-55 tube. 
Model: PCR2055
4 Units in Stock
$0.35

In Stock: 4
CR2060
(image for) Centering Ring - BT-20 in BT-60 (Fiber) - Model Rocket Part

Centering Ring - BT-20 in BT-60 (Fiber) - Model Rocket Part

A fiber centering ring for centering a BT-20 (18mm motor tube) in a standard BT-60 body tube.
Model: CR2060
3 Units in Stock
$0.30

In Stock: 3
PCR2060
(image for) Centering Ring - BT-20 in BT-60 (Plywood) - Model Rocket Part

Centering Ring - BT-20 in BT-60 (Plywood) - Model Rocket Part

This is a plywood centering ring for centering a standard BT-20 body tube in a BT-60 body tube.
Model: PCR2060
17 Units in Stock
$0.79

In Stock: 17
CR2070
(image for) Centering Ring - BT-20 in BT-70 - Model Rocket Part

Centering Ring - BT-20 in BT-70 - Model Rocket Part

A fiber centering ring for centering a BT-20 (18mm motor tube) in a standard BT-70 body tube.
Model: CR2070
25 Units in Stock
$0.35

In Stock: 25
CR2080
(image for) Centering Ring - BT-20 in BT-80 - Model Rocket Part

Centering Ring - BT-20 in BT-80 - Model Rocket Part

A fiber centering ring for centering a BT-20 (18mm motor tube) in a standard BT-80 body tube.
Model: CR2080
42 Units in Stock
$0.45

In Stock: 42
CR520
(image for) Centering Ring - BT-5 in BT-20 (18mm Thrust Ring)

Centering Ring - BT-5 in BT-20 (18mm Thrust Ring)

A paper centering ring for centering a BT-5 (13mm motor tube) in a standard BT-20 body tube. This is also used as an 18mm motor thrust ring or engine...
Model: CR520
4 Units in Stock
$0.25

In Stock: 4
PCR550
(image for) Centering Ring - BT-5 in BT-50 (Plywood)

Centering Ring - BT-5 in BT-50 (Plywood)

This is a light plywood center ring for centering a BT-5 body tube in a BT-50 body tube. 
Model: PCR550
176 Units in Stock
$0.79

In Stock: 176