Specialist terms in our online shop are explained if you hover your mouse over the word.
They are all summarised here again in alphabetical order.

Test weights: classes of accuracy and their general relation to the types of balances:
E2 the most accurate test weights for high resolution analytical balances of verification class I ≥ 100.000 e
F1 Precision weights for analytical balances/ precision balances for verification class I/ II, up to 100,000 e
F2 Test weights for precision balances of verification class II, up to 30,000 e
M1 Precision weights for industrial and commercial balances of verification class III, up to 10,000 e