2 Kings 25:17 (ESV)

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.

There is a difference with 1 Kings 7:1–51 regarding the height of the capitals: five cubits versus three cubits. As five cubits appears twice in 1 Kings 7:1–51, scholars presume that three cubits is a copying error.