For thus saith the LORD of hosts concerning the pillars, and concerning the sea, and concerning the bases, and concerning the residue of the vessels that remain in this city, Concerning the pillars - Two brazen columns placed by Solomon in the pronaos or portico of the temple, eighteen cubits high, and twelve in circumference, 1 Kings 7:16-22; Jeremiah 52:11.
The sea - The brazen sea, ten cubits in diameter, and thirty in circumference. It contained water for different washings in the Divine worship, and was supported on twelve brazen oxen. Perhaps these are what are called the bases here. See the parallel places at 2 Kings 25:13 (note), etc.; Jeremiah 52:17 (note), Jeremiah 52:20-21 (note), and the notes on them.