Calibration discs for Gemtest-PGI Magnifier Style_Reader (handheld) Backlit display with lots of

Backlit display with lots of information

Moissanite in the multi-testers)

10X12 - 10X13 - 10X14 - 10X20* - 10X21 - 10X21 - 10X23 - "30X21”

Good working distance (enough space to work with both hands on the lower magnifications)

Calibration discs for Gemtest-PGI Magnifier Style_Reader (handheld) Backlit display with lots ofDetails Spare calibration discs for GEMTEST PGI. The Gemtest PGI must be calibrated regularly to ensure it is working properly, especially if the temperature changes. This is not difficult: you place the probe on of the circles and press a button, then place it on the other circle and press a button. The only problem is: if you've lost the calibration discs.