C. F. Keil and Franz Delitzsch on 2 Chronicles 3:15

2Ch 3:15 The two brazen pillars before the house, i.e., before the porch, whose form is more accurately described in 1Ki 7:15-22. The height of it is here given at thirty-five cubits, while, according to 1Ki 7:15; 2Ki 25:17; Jer 52:21, it was only eighteen cubits. The number thirty-five has arisen by confounding יח = 18 with לה = 35; see on 1Ki 7:16. הצּפת (ἁπ. λεγ.) from צפה, overlay, cover, is the hood of the pillar, i.e., the capital, called in 1Ki 7:16. כּתרת, crown, capital, five cubits high, as in 1Ki 7:16.