Better fit over BT-20

Posted by Michael Mitchell on 10th Feb 2019

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.