Will be a convenient combination to meet your DIY needs for melting, casting, or refining metal, jewelry, gold, silver, and other materials. Nice features: These graphite casting molds possess many nice features, are characterized by good thermal stability, as well as fast cooling. Their excellent thermal conductivity properties can shorten the casting time and save energy. Dimension: Crucible mold measures approximately 100 x 50 x 25 mm in outer diameter, 90 x 40 x 20 mm in inner diameter. Each crucible stir rod is about 12 inches / 30 cm long. 5-in-1 graphite casting ingot mold measures approximately 72 x 57 x 12 mm in outer dimensions. Quartz crucible approximately 7 cm in diameter, 2.5 cm in height. Tongs are about 10 inches in length. Cylindrical graphite measures approximately 4 cm in diameter, 4 cm in height. Multipurpose: These graphite ingot molds are widely used for experiments and smelting of non-ferrous metals such as gold, silver, copper, aluminum, lead, and more. Ideal for laboratory use, testing, analysis, and similar applications. Given the product size, they are best suited for small-capacity metal melting projects. Reliable to use: Made from high-density graphite material, offering a durable and reliable performance. Resistant to breaking and deformation, designed for long-term use. Suitable for sharing with friends or family members. Color: Black Material: Graphite Package Contents: 1 set x Crucible Note: Light and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allows an error of +/- 1-3 cm.