I would be hesitant. Mine said it would handle 300#. I had a large planter but it was filled half way with packing peanuts, and then dirt on top. I tried to roll the planter and had a terrible time. I ended up buying something else. If you don't have to move it, it would work. But it did not roll very well at all and the pot almost fell off several times.
The Thread size of the wheels is m10 X 25mm.
3 1/8" from floor to top