Features This is a set of calibration weights, with 5 different specifications of calibration weights,More professional and practical. Using chrome-plated material, it has stability and corrosion resistance. Suitable for general laboratory, industrial measurement, educational purposes, etc.; the allowable error is -0.003 to +0.003 g. The appearance of the weight is glossy and shiny, and the production is fine,high strength, high cost performance. Our weights are conjoined cylindrical, with raised parts on the upper end, easy to grasp. 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