Exodus 38:3-7

38:3 He made all the utensils of the altar – the pots, the shovels, the tossing bowls, the meat hooks, and the fire pans – he made all its utensils of bronze. 38:4 He made a grating for the altar, a network of bronze under its ledge, halfway up from the bottom. 38:5 He cast four rings for the four corners of the bronze grating, to provide places for the poles. 38:6 He made the poles of acacia wood and overlaid them with bronze. 38:7 He put the poles into the rings on the sides of the altar, with which to carry it. He made the altar hollow, out of boards.