M2 Chrome Scale Calibration Weight for School Lab Factory

[Gram Weight]: 50g weight with M2 tolerance of ±10mg, 100g weight with M2 tolerance of ±16mg, 200g weight with M2 tolerance of ±30mg, 500g weight with M2 tolerance of ±80mg . 1000g weight with M2 tolerance of ±160mg, 2000g weight with M2 tolerance of ±300mg.