I'm surprise nobody mention the pvc pipe this is were I got my idea thank you qb,years ago I purchased 2 folding tables with wheels for my sewing machines but ended up not likeing them at all too much vibration very annoying push them together and found out they were to low and came across the tip from qb to use pvc pipe so went to lows and got the one and half inch round and had 8 legs cut at 11 inches each and slip them over the table legs work out swell my guess would be that tables legs are different sizes pvc pipes comes in round sizes