1 Kings 7:31-34

31Its 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.

32Under the panels were the four wheels, and the axles of the wheels were joined to the cart. The height of a wheel was one and a half cubits.

33The 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.

34And there were four supports at the four corners of each cart; its supports were part of the cart itself.