Fits BT-3 tube

Semroc Centering Ring Wound Craft Paper BT-3 to BT-5 Long(1pk) SEM-TB-5 *

Semroc Centering Ring Wound Craft Paper BT-3 to BT-5 Long(1pk)  SEM-TB-5 Also used as a Thrust …

Semroc Centering Rings Fiber BT-3 to BT-20(2pk) RA-3-20 *

Semroc Centering Rings Fiber BT-3 to BT-20(2pk)  RA-3-20 Laser-cut rings for centering a BT-3 …

Semroc Centering Ring Wound Craft Paper BT-3 to BT-5(EB-5)(TB-5)(1pk) SEM-CR-3-5 *

Semroc Centering Ring Wound Craft Paper BT-3 to BT-5(EB-5)(TB-5)(1pk) SEM-CR-3-5 Also used as a Thru…

Semroc Centering Ring Wound Craft Paper BT-3 to BT-4(1pk) SEM-CR-3-4 *

Semroc Centering Ring Wound Craft Paper BT-3 to BT-4(1pk)  SEM-CR-3-4 1 pack ID= 0.372" OD= 0.4…

Semroc Centering Rings Fiber BT-2 to BT-3(2pk) RA-2-3 *

Semroc Centering Rings Fiber BT-2 to BT-3(2pk)  RA-2-3 Tough Fiber 0.05" Thick ID= 0.218" OD= 0…