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 handcrafted wood cases. Includes a compartment for a polycarbonate case which holds weights 500 g and below. 1 kg and 2 kg weights are held in individual polycarbonate cases inside a felt-lined cutout. For weights 5 kg and larger, a felt-lined compartment for each weight exists within the wood case (50 kg weights are not supplied in case).