Product review (5 stars): I needed the Tube Link to Connect a Marshall Pressure ...
I needed the  Tube Link to Connect a Marshall Pressure Regulator feeding the House to a Tank I was getting rid of.  Both threaded inlets have Reversed Threads.  This is what this Link provides "Reversed Threads".  Quality construction ! Leak free if tighten to reasonable torque for Brass. When dealing with 150 Gal and larger propane Tanks keep in mind most have reverse Threads in the connecting inlets.