Features: Choice the fused silica as the main raw material, made using modern ceramic processing technology. Mainly used in dental alloys, platinum, gold,silver, copper brass and other high temperature melting alloys. High temperature over 2800 degrees. High purity and high strength, durable in use. High heat resistant, high shock resistance and corrosion resistance. Specifications: Crucible Tongs Material: stainless steel Overall Length: 25cm/10inch Color: silver Net Weight: 310g Cylindrical Graphite Outer Dia.:40 mm/1.57inch Inner Dia.:30 mm/1.18inch Total Height:40 mm/1.57inch Inner Height:35 mm/1.38inch Square Graphite Bulk density ≥1.82 g/cm3 Electric resistivity ≥9 μ Ω m Bending strength ≥45 Mpa resist compression ≥65 Mpa Ash ≤0.1 % particle ≤43 um（0.043 mm） Size: 7.2 x 5.7 x 1.2cm/0.28 x 0.22 x 0.05inch Quartz Melting Crucible Capacity: 150g Material: Quartz Outer Diameter: 57 mm/2.24inch Inner diameter: 43 mm/1.69inch Height: 20mm/0.79inch Depth: 15mm/0.59inch Net weight: approx. 40g Package Included: 1 x Quartz Melting Crucible 1 x Tongs 1 x Square Graphite 1 x Cylindrical Graphite Note: Manual measuring, please allow 1 ~ 3 cm error, thank you.