Exodus 27:3-5

27:3 You are to make its pots for the ashes, its shovels, its tossing bowls, its meat hooks, and its fire pans – you are to make all its utensils of bronze. 27:4 You are to make a grating for it, a network of bronze, and you are to make on the network four bronze rings on its four corners. 27:5 You are to put it under the ledge of the altar below, so that the network will come halfway up the altar.