CALIBRATION WEIGHT DIMENSIONS: 500g weight dimensions: 38 x 63mm (3.8cm x 6.3cm) Diameter x Height. These weights are designed with high precision and have an allowable error margin of +/-0.003g. Perfect for all your weighing needs. STAINLESS STEEL CALIBRATION WEIGHT: Made of high-quality carbon steel for extra durability and features a chrome finish for an elegant look. Compact design for easy access and convenience. This calibration weight construction is made of heavy-duty steel and is durable and rust-free for long-lasting use. PORTABLE WEIGHT SET: These pocket-sized weights are convenient and portable for the user. A compact design that securely holds and protects the calibration weight and makes it easy to store. Contains up to 1 x 500g Weight. WIDE APPLICATION: Perfect for commercial, industrial, laboratory, or educational calibration purposes to ensure the most consistent weight readings on many digital scales. Also used professionally for jewelry, herbs, gemstones, laboratories, home, commercial, or educational purposes for consistent weight reading. SCALE PRECISION ACCURACY: Accuracy is the most important property of scales and therefore there are methods to test and calibrate weighing equipment. This is nickel-plated accurate calibration for most precision scales' accuracy for your personal and professional use.