Precision, compact, and portable balances (readability 0.1 to 0.001 g) can be calibrated with the Basic Class F1 Calibration Set. Included in the set are 23 stainless steel cylindrical and leaf weights, 1 mg to 200g. Cylindrical weights are marked with their nominal value. All are supplied in a protective case along with tweezers, a cleaning cloth and dust brush.