Since this is a middle piece, it should have a hole in the middle for a third stand/support.The picture does not show this. Is the picture wrong, or is this not the right bar for what I need?
Paul, this system is designed to support a tube or pocketed backdrop, so regardless of how many "center" sections are connected in line, they would be contained within the backdrop and not accessible to a vertical pin support like at the ends. hence, there are no center holes; the image is accurate.
should you need a center support, i would suggest looking at mafer clamp on a stand, or some other hook support. but for what it's worth, i run enough of these together to make a 24' span to hang large backdrops and the sag is not too bad. i will sometimes use a basic spring clamp over the crossbar and backdrop tied up to a scissor clamp or the like to straighten everything out.