F1 Grade 1mg-500g Precision Stainless Steel Scale Calibration Weight Kit Set F1 grade 1mg-500g stainless steel scale calibraiton weights kit sets, balance weights. Total 24pcs weights, use 304 stainless steel. Packed in aluminium alloy case, with factory’s certificate. Package included: 1x 1mg weights,            2x 2mg weights 1x 5mg weights,            1x 10mg weights   2x 20mg weights,          1x 50mg weights 1x 100mg weights ,       2x 200mg weights 1*500mg weights,        1x 1g weights 2x 2g weights,                 1x 5g weights 1x 10g weights,               2x 20g weights 1x 50g weights,               1x 100g weights 2x 200g weights,             1x 500g weights 1x  tweezer,               1x aluminium alloy case   1x certificate of calibration   (see following samples, as each set is different, the error of each weights is with small difference, but the error is within the maximum perssible errors of F1 weights ). Nominal Value (g)  Error (±mg) Nominal Value (mg)  Error (±mg) 1000 2 500 0.02 500 0.2 200 0.00 200 0.3 200 0.04 200 0.5 100 0.03 100 0.3 50 0.03 50 0.0 20 0.03 20 0.15 20 0.03 20 0.15 10 0.01 10 0.09 5 0.01 5 0.09 2 0.02 2 0.04 2 0.00 2 0.08 1 0.02 1 0.01     What's the difference between our F1 and M1 Weights: 1. F1 are more precise than M1, with smaller permission error, F1 applied to the calibration accuracy of 0.01g-0.001g precision balance scales 2. F1 use 304 stainless steel, M1 use 2cr13 stainless steel 3. M1 are with adjust bar (at the bottom of the weights), F1 are without.

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