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1g 2g 5g 10g 20g Grams Precision Steel Calibration Weight Kit Set for Balance Scale The calibration gram scale weight set for testing and calibrating scales. These weights are calibrated to within ±0.016g accuracy (OIML Class M1, no certificate supplied). Check your scale's manual before purchasing to make sure you buy the correct weight for your scale. Most scale's require a specific calibration weight to calibrate. Calibration weight set: Calibration weight suit for digital pocket scale, jewelry carat scale, diamond scale, etc., bring you a precise life. Specification: Gram weights: 1 g, 2 g, 5 g, 10 g, 20 g Material of the weight: steel with chrome plated 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)