Cast Iron ingot mold with the slight wall taper for better metal removal. This Mold is great for making Loaf type bars. The weight of each bar depends on what metal your working with and how full you fill the cavity. These Steel Molds are not smooth inside the cavity like our Graphite molds are, Overall length is 6-1/2" and inside size is 1" deep & at the top its 1-1/4" X 2-3/8"