Scale Calibration Kit Features: Includes tweezers and 8 calibration weights 50g (500mg) Two 20g (200mg) 10g (100mg) 5g (50mg) Two 2g (20mg) 1g (10mg) Suitable for general laboratory, commercial, and educational use Steel construction of calibration weight with chrome-plated finish for good stability, corrosion resistance, and low magnetic susceptibility, good quality and Durable