High-Quality Melting Set: Includes a 500g ceramic crucible bowl ideal for 24K gold. The set also features two smaller 100g crucibles, perfect for metal melting needs. Optimal Design and Materials: The crucibles are crafted from 99.99% pure quartz, offering exceptional resistance and thermal conductivity. They can withstand temperatures up to 2800 degrees, ensuring reliable performance for all your refining needs. Comprehensive Accessories: This set comes with one large 500g crucible and two smaller 100g crucibles, each designed with a convenient pour spout. Also included are stainless steel whip tongs for safe handling, enhancing your metal processing experience. User-Friendly Features: Each crucible needs to be glazed with the included 20g of pure borax before use to a smooth melting process and prevent gold from sticking. This professional-grade set is trusted by numerous jewelry makers for its efficiency and quality. Safety and Usage Instructions: It is crucial to heat the quartz ceramic crucible bowls slowly to prevent thermal shock. The ergonomic tongs are designed to offer a comfortable grip, protecting your hands during the melting process. Color: White Material: Quartz + Metal The actual product may have slight color difference or discrepancy, which not affect the use Package Contents: 1 x Tongs 2Pcs Small 100g Crucible Bowls 1 x 500g Crucible Bowls 1 x Pure Borax 20g (Random packaging, No specification accepted) 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.