Exodus 27:3-7

You shall make pots to remove its ashes, and shovels, basins [to catch the blood of the sacrificed animal], meat-forks, and firepans [to store live coals]. You shall make all its utensils of bronze. Also make a grate for it, a network of bronze; and on the grid you are to make four bronze rings at its four corners. And you shall put it under the ledge of the altar, so that the grid will extend halfway up the altar. You shall make [carrying] poles for the altar, poles of acacia wood, overlaid with bronze. The poles shall be inserted through the rings on the two sides of the altar so that it may be carried. [Num 4:14, 15]