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Durable Silicon Carbide Graphite Crucibles ★Specification★ Highest Withstand Temperature: 1800℃(3272°F) Capacity: 750ML, can casting 6kg Copper or 2.2kg aluminum Outer Size: 130mm Diameter x 145mm Height. Inner Size: 110mm Diameter x 130mm Depth. Bulk Density: 1.71g/cm3 Apparent Porosity: ≤30% Refractory Strength: ≥8.55Mpa Weight: 1200g ★composition★ C: 45% Al2O3: 26% SiC: 23% SiO2: 6% It is 3-8 times longer life than clay crucible. Suitable for high temperature metal smelting. Fit for all the furnace such as Coke-Oven, Fuel Burner, Electric Furnace. Melting Gold, Silver, Copper, Brass, Aluminum and more. ★Package★ 1x Silicon Carbide Graphite Crucibles