Presidium standard+duo probe, old (before oct 2020) models Polishing compounds - cleaning and plating fluids 22K or 24K

22K or 24K

This is a good way of getting your customer excited about their purchase

For measuring specific gravity

see calibrating weighing machines

Presidium standard+duo probe, old (before oct 2020) models Polishing compounds - cleaning and plating fluids 22K or 24KDetails This probe has the old style connector, please check carefully to see if you have an old model or a new model, or it won't fit. It fits the following Presidium electronic gem testers: our ref. Gemtest P Presidium's ref. PGT and also the OLDER versions of our ref. gemtest duo Presidium's ref. PDT S7 Not sure which you have? See our information sheet.