An F1 Class Weight Box is a high-precision set of stainless-steel calibration weights designed to meet OIML F1 accuracy standards, making it ideal for calibrating analytical and precision balances. Constructed from high-grade Austenitic 316 stainless steel, the weights offer excellent corrosion resistance and long-term stability. Each weight is cylindrical with a polished mirror finish for easy handling and minimal contamination. The complete set, typically ranging from 1 mg to 200 g, is securely packed in a special aluminum or SS storage box to ensure protection from dust and environmental effects. Commonly used in laboratories, calibration facilities, and industries requiring rigorous measurement accuracy.