- Parts for Rockets
- Centering Rings
- Semroc Centering Ring ST-9 to BT-55(6pk) with Engine Hook Cut Out SEM-CR-9-55E *
Semroc Centering Ring ST-9 to BT-55 (6pk)
Featherweight laser-cut fiber ring set which centers a ST-9 tube inside a BT-55 tube. Thickness is .050".