Caster Socket for 3/4" Round OD Tube, use with Socket stem 5/16" x 1-1/2", 4-Pack

They do the job, should fit most standard roly wheels, but had to wrap two layers of duct tape around the threaded insert to get them to stay inside the PVC tubing.

Always wanted to put casters on my metal wire shelving unit. It took some weight to get these into the post, but you want a tight fit. The casters fit perfectly into them.

IT WAS EXACTLY WHAT I NEEDED

Great product

These were very sturdy and I believe they would have been great, but they were not the correct size for my bed and rollers. Sadly, I had to return.