It is just a one inch slice off the end of a piece of pvc pipe that we then cut into two semicircles instead of having the whole circle. I would barely start wrapping the edge of the solar cover onto the pvc and then put one of the semi-circles on there and it would hold the cover onto the pipe. I put one semi-circle on each end and then would just roll it up!

I had pictures of it. Did you see them? Go to the Pool Equipment and Operations section of the forum. The first stickied thread there is about solar cover reels. Down in post #3, I linked to a thread where I showed with pictures about my set-up when I had my 24ft AG pool. (Until your registration is complete, you will have to log out first to be able to see the rest of the forum.)