UltraClass
The weight tolerance is equal to ANSI/ASTM E617 Class 0 and exceeds OIML R 111 Class E2. This class is used as a reference standard for calibrating other reference standards and weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.01 mg.
Weight Sets are supplied in a high quality polycarbonate case with a compartment for each weight as well as compartments for a brush, forceps and USB flash drive.