Its opening inside the crown at the top was one cubit in diameter; and the opening was round, shaped like a pedestal, one and a half cubits in outside diameter; and also on the opening were engravings, but the panels were square, not round.
The workmanship of the wheels was like the workmanship of a chariot wheel; their axle pins, their rims, their spokes, and their hubs were all of cast bronze.