Gold Testing Needle with Set of 5 Needles Size 12k, 14k, 18k, 20k & 22k

-5 pieces set of test needles: 12k, 14k, 18k, 20k & 22k. They are used with test stones and testing solutions to determine the contents of gold and other precious metals.

-This set of gold testing needles comes with 12k, 14k, 18k, 20k & 22k tips, and is used to test the karat content of gold.

-Use testing acid and an acid testing stone with gold testing needles to achieve the most accurate results.

-Each needle measures 1.75” (4.4 cm) long, and they come on a brass ring.