This item is well made of premium steel with finish for durable and practical use. These items are used to calibrate digital scale so as to weight things more accurately. This precise calibration set has all of the weights you will need and more! It is suitable for general laboratory, commercial, and educational use. Features - Color: As shown. - Material: Steel. - Size: 11x7x4.5cm - Package: 100g, 50g, 20gx2, 10g, 5g, 2gx2, 1g, 10mg, 20mgx2, 50mg, 100mg, 200mgx2, 500mg, tweezers - With tweezers to conveniently hold all of the weights for quick easy access. - Polished, wear-resistant, accurate scale weights to use. - Ensuring a properly calibrated scale especially for science measurement. - Made of steel with plating, will not rust and defect free. - Suitable for general scientific laboratory, commercial, and educational use.Package list1 Set x 200g Precision Steel Scale Weight