Crucible & Oven Tong for Casting Tool This is a new melting crucible This size is great for use with a melting furnace This is the best choice for gold, silver, bronze, etc Made of fused silica with clay bond for melting temperatures up to 2,500 degreesF (1,371 degreesC) Pouring spout measures approximately 3/8" (9.5 mm)