Top-Quality Product: The crucible has good thermal stability, high strength, and shock resistance and our crucibles are long-lasting. Equipped with ceramic silica crucible that is ideal for both small and large-scale projects. Extreme Strength: A crucible is a ceramic container in which metals or other substances may be melted or subjected to very high temperatures. This is a reverse action tool. Precautions: (1) Clean crucibletongs must be used when using. (2) When using crucibletongs to pick up a hot crucible, the tip of the tongs must be preheated to prevent the crucible from rupturing due to local cooling. After use, the tip of the tongs should be placed on the tabletop or asbestos net. (3) Never fill the crucibles with cold metal, such as aluminum – as there are strong chances that the metal will expand and crack the container. Also make sure to never allow the metal to solidify in the bottom of the crucible, for the same cause. (4) It is better to use different crucibles for different types of metals to avoid contamination. (5) Protective Clothing, heat gloves, and eye protection must be worn when meltingmetals. Safety factors must always be the Priority! WORK SAFE !! Specification: Material: Ceramic, Stainless Steel Item Type:Crucible Set Package Content: This kit includes 2 ceramicdishes with whiptongshandle.