Silver Graphite Ingot Mold 1/2oz. 1/4oz.combo Cavity sizes are1.0L x 0.5W x .180D for 1/2 oz and 0.725L x 0.40W x .180D for the 1/4 oz. .CNC Machined into high density graphite block. Sized for .999 Pure Silver,will work for other metals but wieght of finished product will be different.would work well for 1oz and 1/2 oz gold bars