0.5kg-4kg High Purity Melting Graphite Crucible For Gold Silver Copper Metal High-temperature Smelting Cup,jewelry Casting Tools - Jewelry Tools & Equipments - AliExpress
DAUERHAFT 4Kg Silicon Carbide Graphite Crucible for Smelting Precious Metals Such as Gold and Silver, Graphite Furnace Casting Crucible High Purity, High Density, High Mechanical Strength : Amazon.co.uk: DIY & Tools