Accurately determine the karat value and purity of gold with this professional test acid. Ideal for jewelry, coins, bars, and scrap, simply apply a drop to reveal results. This 22K testing solution comes in ½ fl oz (12g) bottles with a leak-proof internal baffle for precise application and safety. This test identifies if a metal is not gold, 22K, or above 22K. Each package includes 3 bottles for professional use.