Hank Chapman Jr Flux & Thinner Combo-Refine Gold-Silver-Jewlery-Smelting-Assay-Black Sands Recovery- Ore-Mining-Prospecting-Furnace-Kiln-Propane Gas-Slag-Buttons This is 1 Lb of the famous Hank Chapman Jr Refining Flux & 2 Tablespoons of his Thinner The Best Smelting or Melting Flux I have ever used Get the Gold out of your Black Sands Get the junk out of your Jewlery pours