Description: 【Quality material】: Crafted from quality ABS material, this diamond tester pen is sturdy and resistant to wear. Its sturdy construction ensures it won't easily deform, allowing for repeated use over time 【User friendly design】: Specifically designed for diamond detection, this jewelry selector is simple to operate and provides quick and accurate differentiation between real diamonds and other simulated gemstones 【Versatile functionality】: Equipped with a multifunctional design, this diamond testing pen tool is nice for testing diamonds, moissanite, and other gemstones, making it an essential addition to any gem enthusiast's toolkit 【Compact size】: Measuring 15.8 cmx4.5 cmx2.1 cm/6.22 inchx1.77 inchx0.83 inch, the thermal conductivity meter boasts a compact and lightweight design that is easy to carry without taking up much space 【Wide application】: Stone hardness tester is ideal for use in purchasing, trading, auctions, or by hobbyists to verify the authenticity of gemstones in various scenarios Specification: Material: ABS     Size Chart: 15.8cmx4.5cmx2.1cm/6.22inchx1.77inchx0.83inch Package Includes: 1pcs Diamond Tester Pen, 1 USB Cable, 1 Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!