N/A ASTM Class 0 weights are used as a primary reference for calibrating other referenced standards and weights. Class 0 weights are intended to be used in metrology laboratories where the stability of the environment and careful handling are assured. Although very stable, one-piece construction Class 0 weights have no method of adjustment and are not suitable for general laboratory use. The uncertainty is guaranteed to be 1/3 the tolerance.

N/A Individual weights must ship in optional case p/n