ASTM Class 6 calibration weights are an economical solution for calibrating scales. They are commonly used in industrial, commercial, general laboratory, and education. They are typically fabricated out of stainless steel or alloy. For more questions about calibration weights and what kind would be best for you application, please contact us. You can reach us through the livechat, via email at email@example.com, or by calling 616-622-2100.