1.WEIGH SCALES CALIBRATION: 7 PCS of calibration weights include 1g, 2g, 5g, 10g, 20g, 50g, 100g, a total of 188 grams. Various scales for precise measuring. Enough quantity for your use.2.: Our Calibration Weights use steel chrome plating manufacturing process, the workmanship is fine. Super mirror polished, smooth and corrosion-resistant.3.ACCURATE MEASUREMENT: These small weights are useful to test the accuracy of scales, keeping your scale calibrated. Making your experiment more effective.4.WIDE RANGE OF USE: Our scale calibration weights suit for general laboratory, commercial, educational use. Such as digital pocket scale, jewelry carat scale, diamond scale, precision balance test.5.WHAT YOU GET: 1g x 1, 2g x 1, 5g x 1, 10g x 1, 20g x 1, 50g x 1, 100g x 1, welcome guide Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.