Semroc Centering Rings Plywood BT-50 to ST-20(2pk) SEM-CR-50-20P
Laser-cut rings for centering a BT-50 tube inside a ST-20 tube
ID= 0.976"
OD= 2.0"
Plywood thickness= 0.125"
Warranty for 1 year from manufacturer defects
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