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M1 grade 1mg-500g stainless steel scale calibraiton weights kit sets, balance weights. Total 24 pcs weights, use 2cr13 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 1x 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 plastic tweezer 1x aluminium alloy case 1x certificate of calibration