Tester Portable Gem-Selector Jeweler Tool Testing Kit Gold Pen Features: This product can select the . Non-destructive testing, do not hurt your item. It will automatically alarm if the battery too low. Portable size, convenient for carrying. Easy to operate and accurate test. Suggestion: In order to detect accurately, the proposed correction once a year. Specifications: Material:ABS Size:Approx.135x40x22mm/5.31''x1.57''x0.87'' Battery:9V (not included) Package Includes: 1x Tester Pen note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
eBay