Features 【HIGH ACCURACY】The weight calibration kit has undergone repeated precision measurements, mirror polishing treatment, easy to clean, anti-fouling and residue, guarantee accuracy, and is very suitable for some precision measurements. 【HIGH QUALITY】5pcs calibration weight is made of high-quality, high-hardness steel, and the surface is chrome-plated to ensure strong, rust-proof and high stability, Tweezers made of antistatic stainless steel. 【CALIBRATION WEIGHT KIT】Stainless steel calibration weight kit has 6 kinds of weights, including 1g, 2g, 5g, 10g, 20g. High weight smoothness, non-contact processing, clear specifications. 【COMPLETE ACCESSORIES】Calibration weight set with 1 convenient tweezers, 1 glass cloth to clean dust before use, 1 storage bag for easy storage of everything. 【WIDELY USED】Metric calibration weights are very suitable for electronic balance scales, digital pocket scales, jewelry carat scales, diamond scales, precision balance tests. Specification: Color: Silver Material: chrome plating Permissible Error: +/-0.003g Item Weight: 1g / 2g / 5g /10g / 20g Package Includes: 1 * 1g Scale Weight 1 * 2g Scale Weight 1 * 5g Scale Weight 1 * 10g Scale Weight 1 * 20g Scale Weight Package List