1. WEIGH SCALES CALIBRATION: Set includes 7 pieces of calibration weights: 1g, 2g, 5g, 10g, 20g, 50g, and 100g, totaling 188 grams. Multiple weight options for precise scale calibration and accurate measurements. 2. HIGH-QUALITY CONSTRUCTION: Calibration weights are made using steel with chrome plating. Smooth, polished finish resists corrosion and ensures durability. 3. PRECISE AND RELIABLE: Designed to verify scale accuracy and support consistent calibration, helping maintain measurement reliability for various applications. 4. VERSATILE APPLICATION: Suitable for use in laboratories, educational settings, and commercial environments. Compatible with digital pocket scales, jewelry scales, carat scales, precision balances, and more. 5. WHAT’S INCLUDED: 1g (1 pc), 2g (1 pc), 5g (1 pc), 10g (1 pc), 20g (1 pc), 50g (1 pc), 100g (1 pc), and user guide.