Great for replacing ceramic crucibles for centrifugal casting machines. 12 oz replacement ceramic crucible with slot to fit Procraft Machines. Suitable for melting temperatures up to 2,500 degrees Fahrenheit. Made of fused silica with clay bond. Capacity: 12 ounces, 240 dwt and 370 grams. 82 by 49 by 59 millimeters with a slot.