Gold Test Kit with Glass Bottles, 8 Piece Set | TES-810.00 Ideal for testing the validity and karat of a gold piece Set includes 3 glass bottles, testing stone, and test needles for 10k, 14k and 18k gold Kit comes in a convenient wooden box for storage and travel Wooden box has compartments to hold each piece separately and safely Glass bottles hold 1/2 ounce of testing acids with an applicator end ground into the stopper