Griffith Nickel Pickling Compound 10 oz. Cans Orders over $100.00 are usually shipped within 24 hrs of receipt (excluding weekends). The estimated delivery dates showing on Amazon are usually delivered much sooner than the dates shown. Dry, granular acid compounds for removing oxides caused by heating precious and non-ferrous metals, such as gold, silver, copper, bronze, brass, German silver, etc. These substitutes for sulfuric acid are non-flammable and non-explosive. NOT TO BE USED ON STERLING SILVER. . Free Shipping!!! Used by Professional Jewelers