Fits BT-55 tube

Semroc Centering Rings Plywood BT-20 to BT-55(2pk) SEM-RA-20-55P *

Semroc Centering Rings Plywood BT-20 to BT-55(2pk)  SEM-RA-20-55P Laser-cut rings for centerin…

Semroc Centering Ring Plywood BT-50 to BT-55 x 0.25"(1pk) CR-50-55P *

Semroc Centering Ring Plywood BT-50 to BT-55 x 0.25"(1pk)  CR-50-55P Laser Cut Lite Plywood&nb…

Estes Flying Model Rocket Part Craft Wound Centering Rings Parts Kit EST 3175

Estes Flying Model Rocket Kit Parts Centering Rings 3175 Includes 26 Centering Rings in 5 different…

Semroc Centering Ring Wound Craft Paper BT-50 to BT-55 Split(1pk) CR-50-55S *

Semroc Centering Ring Wound Craft Paper BT-50 to BT-55 Split(1pk)  CR-50-55S 1 pack ID= 0.978…

Semroc Centering Rings Fiber ST-9 to BT-55(2pk) with Engine Hook Cut Out SEM-CR-9-55E *

Semroc Centering Rings Fiber ST-9 to BT-55(2pk) with Engine Hook Cut Out   SEM-CR-9-55E&nb…

Semroc Plywood Block or Bulkhead for BT-55 tube(2 ring set)(same RA-55P) SEM-PB-55 *

Semroc Plywood Block or Bulkhead for BT-55 tube(2 ring set)(same RA-55P)  SEM-PB-55 Used as lig…

Semroc Centering Rings Fiber BT-55 to BT-58(2pk) SEM-RA-55-58 *

Semroc Centering Rings Fiber BT-55 to BT-58(2pk)   SEM-RA-55-58 Featherweight laser-cut f…

Semroc Centering Rings Fiber BT-50 to BT-55(2 ring set with engine hook slot) SEM-RA-50-55S *

Semroc Centering Rings Fiber BT-50 to BT-55(2 ring set with engine hook slot)   SEM-RA-50-…

Semroc Centering Rings Fiber ST-9 to BT-55(2pk) SEM-CR-9-55 *

Semroc Centering Rings Fiber ST-9 to BT-55(2pk)   SEM-CR-9-55 Featherweight laser-cut fib…

Semroc Centering Rings Fiber ST-7 to BT-55(2 pieces set with engine hook slot) SEM-CR-7-55EH *

Semroc Centering Rings Fiber ST-7 to BT-55(2 pieces set with engine hook slot)   SEM-CR-7-…

Semroc Centering Rings Fiber ST-7 to BT-55(2pk) SEM-CR-7-55 *

Semroc Centering Rings Fiber ST-7 to BT-55(2pk)   SEM-CR-7-55  Laser-cut fiber rings…

Semroc Centering Rings Fiber BT-55 to BT-80(2pk) SEM-RA-55-80 *

Semroc Centering Rings Fiber BT-55 to BT-80(2pk)   SEM-RA-55-80 Light weight laser-cut fib…

Semroc Centering Rings Fiber BT-55 to BT-70(2pk) SEM-RA-55-70 *

Semroc Centering Rings Fiber BT-55 to BT-70(2pk)   SEM-RA-55-70 Featherweight laser-cut f…

Semroc Centering Rings Fiber BT-55 to BT-60(2pk) SEM-RA-55-60 *

Semroc Centering Rings Fiber BT-55 to BT-60(2pk)  SEM-RA-55-60 Laser-cut rings for centering a…

Semroc Centering Rings Fiber BT-5 to BT-55(2pk) SEM-RA-5-55 *

Semroc Centering Rings Fiber BT-5 to BT-55(2pk)   SEM-RA-5-55 Laser-cut rings for centeri…

Semroc Centering Rings Fiber BT-20 to BT-55(2pk) SEM-RA-20-55 *

Semroc Centering Rings Fiber BT-20 to BT-55(2pk)  SEM-RA-20-55 Laser-cut rings for centering a…

Semroc Centering Ring Wound Craft Paper BTH-52(LT-115) to BT-55(1pk) SEM-CR-52H-55 *

Semroc Centering Ring Wound Craft Paper BTH-52(LT-115) to BT-55(1pk)  SEM-CR-52H-55 Laser-cut …

Semroc Centering Rings Fiber BTH-50 to BT-55(2pk) RA-50H-55 *

Semroc Centering Rings Fiber BTH-50 to BT-55(2pk)  RA-50H-55 Laser-cut rings for centering…

Semroc Centering Rings Fiber BT-50 to BT-55(2pk) RA-50-55 *

Semroc Centering Rings Fiber BT-50 to BT-55(2pk)  RA-50-55  Laser Cut Fiber Rings to fit a…