These ceramic crucibles are great for those who are using a torch method to melt down their materials. They are designed with tapered sides and a pour spout for easy material removal, and suitable for melting precious metals (gold, silver, bronze, copper, brass, etc.) in temperatures up to 2800°F. Holds up to 3 oz of pure gold; other metal capacities will vary. Dimensions: Outer Diameter: 56 mm x 56 mm. Please contact us with any questions. Thanks for looking!