Specifications: Quartz and ceramic materials, handle and clamp materials are stainless steel. Size: The maximum opening width of the fixture is 10 inches/25cm. The size of the bowl is 3.3 x 2.8 x 1.3 x 1.2 x 3.4 inches/83 x 70 x 34 x 30 x 87 mm (outer diameter x Inner diameter x Height x Bottom outer diameter x total width), capacity: 250g, packing list: total 6 pieces. Advantages: The molten ceramic crucible bowl is made of ceramic with a purity 99% and can withstand temperatures up to 1000-3000. It has a high density and not mix with other items during the melting process. It has resistance and impact resistance. Better antioxidant capacity. Application: Crucible bowls are ideal for melting and casting metals, gold, silver, copper, brass, alloys and other superalloys, and are widely used in chemistry and industry as well as in chemistry laboratories. Note: It is recommended that the heating speed should not exceed 50 degrees Celsius per minute. Heating and cooling during the test should be as slow as possible to extend the service life of the product. Instructions:Slowly heat the quartz ceramic bowl before use. Colour: Material:Metal+Ceramics Package Contents: 2 * tongs 4 * bowls Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.