This tent pole adapter is for 19mm OD / 17mm ID tubes.

Used this for the Jayco Camper Bed End Modification (used at the van end of poles, attaching with bolts).

But could be used to replace any fittings for your tent poles, if they are the right size.

Have hollowed out the part that goes into the pole to save print time. Doesn't reduce strength significantly.

Use a screw or rivet through the pole to keep from pulling out.