Purity Tester *300g/0.001g, 6K-24K *RSC232 interface, ... ,Karat 300g/0.01g 6K-24K Density Purity Tester MODELMH-300KMaximum weighing300gMeasurable range5-300gWeighing precision0.01gAverage weight0. ... density parameter valueSegment interfaceRS-232Instrument accessoriesaccessories, Thermometer, Tweezers, Calibration weight, Acadapter, Opration manualManufactureNapco Precision Instrument Ltd 300g/0 ...