Fits BT-55 tube

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&nbs…

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 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 r…