Semroc Tubing Outside Coupler/ Retaining Ring for BT-20, 1.0" Long with Vent Hole Punched(was RR-7)(1pk) SEM-JT-20BP
Spiral Wound Gray Rice Paper Coupler
With 0.23" vent hole punched in the side
ID: 0.760"
OD: 0.802"
Thickness: 0.021
Made in the USA
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Better fit over BT-20
I inquired about the fit of this item before purchasing, as I couldn't remember if it was Estes (BT-20) or Centuri (ST-7) that earlier introduced this as an outside tubing staging coupler. Because this item is a easy slip fit over the BT-20 and does not fit onto any of my ST-7 tubes, I believe this product originated with Estes (BT-20 fit), not Centuri.