Exodus 38:10

and cast for it four rings: two on the one side and two on the other side, broad, so that [men] should lift it with the staves in them.

Their pillars were twenty, and their brasen sockets twenty; the hooks of the pillars and their fillets were of silver.

their pillars were twenty, and their sockets twenty, of bronze; the hooks of the pillars and their fillets were of silver.