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International M1 level calibration weights for your mini Pocket Digital Balance Scale. Suitable for general laboratory, commercial, educational use, etc. Specification: Color:Silver Gram weights: 1 g, 2 g, 5 g, 10 g, 20 g Material: steel with smooth chrome finish Material of the tweezer: stainless steel with anti-static finish Package included: 1 x Calibration weight (1 g) 1 x Calibration weight (2 g) 1 x Calibration weight (5 g) 1 x Calibration weight (10 g) 1 x Calibration weight (20 g) 1 x Tweezer 1 x T Level Bubble Level Warm notice: it is normal that there may be slight error around -0.005 to +0.005 g.