Precision, compact, and portable balances (readability 0.1 to 0.001g) can be calibrated with our Basic Class F1 Calibration Set. Included in the set are 23 stainless steel cylindrical and leaf weights: 2x200g, 1x100g, 1x50g, 2x20g, 1x10g, 1x5g, 2x2g, 1x1g, 1x500mg, 2x200mg, 1x100mg, 1x50mg, 2x20mg, 1x10mg, 1x5mg, 2x2mg, 1x1mg. Cylindrical weights are marked with their nominal value. All are supplied in a protective case along with tweezers, a cleaning cloth and dust brush.