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 moulds possess many beneficial features, including good thermal stability and fast cooling. Their excellent thermal conductivity properties can shorten casting time and save energy. Dimension: Crucible mould 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 mould measures approximately 72 x 57 x 12 mm in outer dimensions. Quartz crucible measures approximately 7 cm in diameter and 2.5 cm in height. Tongs are approximately 10 inches in length. Cylindrical graphite measures approximately 4 cm in diameter and 4 cm in height. Multipurpose: These graphite ingot moulds are widely used for experiments and smelting of non-ferrous metals such as gold, silver, copper, aluminum, lead, and more. Ideal for laboratory, testing, and analysis purposes. 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 breakage 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: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause the color of the item in the image to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.