Induction 3KG Crucible - Graphite with Ceramic SleeveAdvanced Thermal Design This crucible features a high purity graphite inner liner for maximum thermal conductivity and a clean pour. To protect the graphite from rapid oxidation at high temperatures, it is housed in a heavy duty ceramic refractory sleeve, significantly extending the tool's lifespan compared to standard graphite crucibles. Key Features High Volume Capacity: Optimized to hold up to 3kg of Gold (approximately 1. 5kg2kg of Silver). Dual