Canvas Side Curtain Frame

[Jim Price]

I recently purchased a well used side curtain from Brian Asbury so that I could use it as a pattern for making up a pair of curtains for my F8 doors. Am almost finished with both but have a question. I do not have any parts of the frame that supports the curtains. The two holes in the doors are 1/2" in diameter. Which of the following are the frame pieces made of: 1/2" rod, or pipe, or some type of hardwood? Or, something else?

Any help on this will be most appreciated!

Regards,
Jim