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 precession 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: 12.5 x 8 x 7cm. - Package: 10g+20gx2+50g+100gx2+200g+500g+ Nipper x 1. - Made of steel chrome, this weights are absolutely not rust and defect free. - Smooth surface: The tweezers is convenient to hold all of the weights for quick easy access. - Quality craftsmanship gives you peace of mind about an accurate scale. - It is perfect for ensuring a properly calibrated scale especially for science measurement. - Suitable for general scientific laboratory, commercial, and educational use. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Packing list: 1 Set x 1000g Precision Steel Scale Weight