... know impurities *Test Density,Valoum,K of Au,Pt 300g/0.01g 6K-24K Density Metal Tester MODELMH-300KMaximum weighing300gMeasurable range5-300gWeighing ... , Tweezers, Calibration weight, Acadapter, Opration manualManufactureNapco Precision Instrument Ltd 300g/0.01g 1K-24K Density Electronic Metal Tester