They made all its utensils1 of bronze--its pots, shovels, sprinkling bowls, meat forks and firepans.
References for Exodus 38:3
They made a grating for the altar, a bronze network, to be under its ledge, halfway up the altar.
They cast bronze rings to hold the poles for the four corners of the bronze grating.
They made the poles of acacia wood and overlaid them with bronze.
They inserted the poles into the rings so they would be on the sides of the altar for carrying it. They made it hollow, out of boards.