2 Kings 25:17
The height of the one pillar was eighteen cubits, and on it was a capital of bronze. The height of the capital was three cubits. A latticework and pomegranates, all of bronze, were all around the capital. And the second pillar had the same, with the latticework.
1 Kings 7:15-22
He cast two pillars of bronze. Eighteen cubits was the height of one pillar, and a line of twelve cubits measured its circumference. It was hollow, and its thickness was four fingers. The second pillar was the same.
Jeremiah 52:21-23
As for the pillars, the height of the one pillar was eighteen cubits,its circumference was twelve cubits, and its thickness was four fingers, and it was hollow.