Semroc Plywood Bulkhead Block for ST-18 tube(2 ring set) SEM-PB-18
Used as lightweight bulkheads for gluing on the end of a HTC-18 coupler, one ring fits inside the coupler and one on top to match the ID of the tube.
Hole for Screw Eye #10(SE-10)
Thickness assembled: 0.25"
Diameter: 1.84" and 1.8"
Made in the USA
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