Fits BT-55 tube

Semroc Centering Rings Plywood BTH-50 to BT-55(2pk) SEM-RA-50H-55P

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

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 centering a BT…

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 

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

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  Featherweig…

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

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

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 fiber rings …

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-50-55S Laser …

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 fiber ring set…

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-7-55EH Laser…

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 which center a …

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 fiber rings w…

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 fiber rings …

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 BT-55…

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 centering a BT-5 m…

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 BT-20…

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 rings …

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

Semroc Centering Rings Fiber BTH-50 to BT-55(2pk)  RA-50H-55 Laser-cut rings for centering a BTH-5…

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

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