Yes. It's 1 3/8" chain link top rail. It will slide into 1 1/2" metal conduit fittings. Top rail is tubing, which quotes the outside diameter as the size. EMT is pipe, which quotes the inside diameter for sizes. For the building pictured, I cut 90 degree conduit elbows in half to make 45s. Those sink into chain link posts, and the conduit goes into that. Here's a pic:
http://i.imgur.com/CoWb0Um.jpg
The high tunnel pictured is 18x48. The peak is 8' and the sides are 4'. I built it low to the ground for the sake of being strong against the wind. The compromise is that it doesn't handle snow very well. I really should take the plastic off every fall, but I end up just going out there and knocking the snow off when we have it. I only had to do that once this past winter.