A home owner from USA says:
September 22, 2015
Here is the second pict / each window has 2 of theses for each window Called earlier / the round tube is 5/8 and 26 inches long
Paul from SWISCO responded:
September 24, 2015
You're showing two parts in these pictures and I'm not sure exactly what you need. The first picture shows a pivot shoe, which seems to resemble our 15-129. Please confirm that your measurements are the same as yours.
The second picture shows a spiral balance. With a diameter of 5/8", I'd recommend our S600-26 with a Red Tip.