2 kg ASTM Class 1 Calibration Weight without CertificateFeaturesCan be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances...
2 kg ASTM Class 4 Calibration Weight without CertificateFeaturesCan be used for calibration of semi-analytical balances and for student use.Can be used to check or verify the accuracy of your balance...