1mm - 20mmAccurately measures small gemstones
The high-quality optics provide distortion-free viewing
Flexible and Detachable : It can move up and down due to flexible pivot and can lay idle over the heads while not in use
Presidium GemTester Pen Probe- I is an add on accessory to be used specifically with Presidium Gem Tester and Duo Tester only
and diamond manufacturers
Ultrasonic Economical CD-4831 3 Ltr. Manual Gauges & Calipers 1mm - 20mmAccurately measures smallMore Features : Engineering Grade Plastic Moisture proofed PCB with industrial IC 3 Color LED Display Detachable power cord More Places of uses : Biology Chemical Laboratories, Mobile phone and Electronic Service Shops, Printing Shops and Automotive Shops Sample Applications : Jewelry : Necklaces, rings, earrings, bracelets, etc. Personal Items : Eyeglasses, sunglasses, shaver, heads, watch bands, diver's watches, dentures, etc. Dental Instruments :