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.HIGH-QUALITY: 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*1, 2g*1, 5g*1, 10g*1, 20g*1, 50g*1, 100g*1, welcome guide