Tri Electronics Gold Tester GT-3000
The most accurate, low-cost tester available, backed by dependable service and built by Tri-Electronics, the inventor of electronic gold testers. Measures white, yellow, pink and green gold in a full range of values from 6 to 18 karat. No dangerous chemicals or mixing of fluids, so it's ecologically safe. Measures 12" x 9" x 1-3/4" (305 x 229 x 44 mm). UL listed. Two year warranty. Also operates using two 9 volt batteries (not included) THIS ITEM IS NON RETURNABLE.