Fits T-38mmH tube

Semroc Centering Rings 1/4 inch thick Plywood 38mm to T-4.0(2pk) SEM-CR-38mm-4.0-1/4P

Semroc Centering Rings 1/4 inch thick Plywood 38mm to T-4.0(2pk) SEM-CR-38mm-4.0-1/4P ID= 1.64" OD=…

Semroc Plywood Block or Bulkhead for 38mm tube(2 ring set) SEM-PB-38mm

Semroc Plywood Block or Bulkhead for 38mm tube(2 ring set)  SEM-PB-38mm Plywood Blocks are used…

Semroc Centering Rings 1/8 inch thick Plywood 38mm to T-3.1(2pk) SEM-CR-38mm-3.1P

Semroc Centering Rings Plywood 38mm to T-3.1(2pk) CR-38mm-3.1P 2 pack Made of 0.125" Light Plywood …

Semroc Centering Rings 1/8 inch thick Plywood 38mm to T-3.0(2pk) SEM-CR-38mm-3.0P

Semroc Centering Rings Plywood 38mm to T-3.0(2pk) CR-38mm-3.0P 2 pack ID= 1.625" OD= 2.95" Thicknes…

Semroc Centering Rings 1/8 inch thick Plywood 38mm to T-4.0(2pk) SEM-CR-38mm-4.0P

Semroc Centering Rings Plywood 38mm to T-4.0(2pk) CR-38mm-4.0P 2 pack ID= 1.64" OD= 3.896" Thicknes…