Fits BT-4 tube - 0.448"

Semroc Centering Ring Wound Craft Paper BT-2 to BT-4(1pk) SEM-CR-2-4

Semroc Centering Ring Wound Craft Paper BT-2 to BT-4(1pk) SEM-CR-2-4 1 pack ID= 0.281"

Semroc Centering Rings Fiber BT-4 to BT-20(2pk) SEM-RA-4-20

Semroc Centering Rings Fiber BT-4 to BT-20(2pk)   SEM-RA-4-20 Featherweight laser-cut fiber rings wh…

Semroc Centering Rings Fiber BT-4 to BT-50(2pk) SEM-RA-4-50

Semroc Centering Rings Fiber BT-4 to BT-50(2pk)  RA-4-50 2 pack

Semroc Centering Ring Wound Craft Paper BT-4 to BT-5(1pk) SEM-CR-4-5

Semroc Centering Ring  Wound Craft Paper BT-4 to BT-5(1pk) SEM-CR-4-5 1 pack

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

Semroc Centering Rings Fiber BT-2 to BT-4(2pk) SEM-RA-2-4

Semroc Centering Rings Fiber BT-2 to BT-4(2pk)  RA-2-4 2 pack