Presidium GemTester Pen Probe- I

Presidium GemTester Pen Probe- I is an add on accessory to be used specifically with Presidium Gem Tester and Duo Tester only. Usually, it comes bundle with our Presidium Gem Tester. 

However, it can be purchase as a replacement tool seperately (without needing to buy the whole set of  the presidium tester) once your older pen probe is damaged or missing.