Just a quick print to put more hanger space on a cheap clothes horse with a cable tensioner for added stability.
Large retainer will fit a pole of up to 26mm approx.
Smaller retainer will fit a pole up to 24mm approx,
The retainers use a nut and bolt to fix to the pipe.
FYI: the cable in the picture is outdoor clothes line with a steel stranded core. This is only needed for a few hours in a sale so not tested to last or take lots of heavy clothes!