Pre/Post Assay Precious Content Purity Acid-Test Kit- Gold Silver Platinum Cupel Furnace Testing
Very easy to use and includes instructions. Sealed box contains six (6) bottles test solution; each bottle contains 1/2 fluid oz (0.5 fl oz) test acid. You will receive one 10k solution, one 14k solution, one 18k solution, one 22k solution, one Silver solution, and one Platinum solution--each new in box sealed with shrink-wrap. Test stones and files are brand new, and will last many uses.  extra large stones measure 6 inches x 3 in.; the standard size (small) stones are 2in x 2 in; files measure 5.5 inches (~14 cm) in length.