Fits BT-80 & BTH-80 tube

Semroc Centering Rings Plywood ST-9 to BT-80(2pk) SEM-CR-9-80P

Semroc Centering Rings Plywood ST-9 to BT-80(2pk)   SEM-CR-9-80P Laser-cut rings for cente…

Semroc Centering Rings Fiber ST-9 to BT-80(2pk) SEM-CR-9-80

Semroc Centering Rings Fiber ST-9 to BT-80(2pk)   SEM-CR-9-80 Laser-cut rings for centerin…

Semroc Centering Rings Plywood 4xBT-50-BT-80(2pk) SEM-RA-4x50-80P

Semroc Centering Rings Plywood 4xBT-50-BT-80(2pk) RA-4x50-80P  2 pack 0.125" Lite Plywood ID= …

Semroc Centering Rings Plywood 3x50-80P(2pk) SEM-RA-3x50-80P

Semroc Centering Rings Plywood 3x50-80P(2pk)  RA-3x50-80P 2 pack ID= 3x 0.978" OD= 2.553" 1/4" …