Each 3/4 Ounce Bottle (22ml) contains enough acid for hundreds of tests. Shipping with vacuumed and most secured way! You can test your gold/silvers at home. It is eEssential for Every Households, Collectors, Jewelers, Pawns Shops. Kit includes; 1 bottle 10k Gold Testing Solution, 1 bottle 14k Gold Testing Solution, 1 bottle 18k Gold Testing Solution, Scratch Stone and Instructions Paper. You can use our 18k solution for test Silvers too! Do not touch to solution with bear hand, use wipes, towel, or cloth to wipe it. Keep out of reach of children