Finely balanced nickel-plated steel calibration weights are ideal for use with mini digital scales. These weights are designed with high precision and have an allowable error of +/-0.003g. With an accuracy tolerance of +/- 5mg, the weights provide precise measurements for jewelry or accessories. We provide cast iron and steel weights coated with nickel plating for long-lasting use. The coating on each calibration tool guarantees a rust-free quality without the risk of early oxidation, so you can use it even in wet areas. Convenient and portable, these are ideal for use anywhere. The test weights are packaged in a container with a foam-lined lid to keep the weights safe and protected. Suitable for commercial use, general laboratory use, and educational use. The quality craftsmanship allows you to use this calibration weight alone or combine it with more weights to calibrate precisely with your digital scale. Perfect for checking digital scales or pocket scales as well as in jewelry, herbs, gemstones, pocket scales, kitchen scales, chemicals, pharmaceutical use, and other accessories. Care instructions: To ensure the scales are accurate, they must be kept clean, and the batteries must be replaced at the correct intervals. Each kit is available in different quantity choices: 500g set weight: 10g one + 20g two + 50g one + 100g two + 200g one = total 500g Delivery quantity: 1 set Product color: silver