This EASY to use genuine JSP GTE kit will determine the karat value and purity of Gold Jewelry, scrap, bars, coins, and much more! *Our goal is to make testing your jewelry FUN, FAST, and EASY! *We promise that our acids are guaranteed to be FRESH! *Each bottle will test hundreds of times! *These small bottles are perfect for traveling with or carrying in a purse or briefcase. Quick easy to use; instructions included. *A MUST-HAVE for anyone who invests in gold! This 6 Piece kit includes: - JSP 10K Gold Testing Acid Solution 0.5 oz. - JSP 14K Gold Testing Acid Solution 0.5 oz. - JSP 18K Gold Testing Acid Solution 0.5 oz. - GTE 3''x6'' Large Scratch Stone (with rubber backing for non-slip desktop testing) - GTE Neutralizer solution (used to clean the stone between each test) 0.5 oz. - Easy to read and follow instruction booklet with color chart! Acids are always fresh!