Jeremiah 52:21

And concerning the pillars, the height of one pillar was eighteen cubits ,.... As in 1 Kings 7:15 ; said to be thirty five, 2 Chronicles 3:15 ; of the reconciliation of which; see Gill on 2 Chronicles 3:15 ,

and a fillet of twelve cubits did compass it ; a thread or line of that measure encompassed each of the pillars, 1 Kings 7:15 ;

and the thickness thereof was four fingers ; either of the pillar, or the fillet about it; that is, the brass of it was four fingers thick:

it was hollow ; that is, the pillar was hollow.