This is a must have for anyone with a pocket scale. This precession calibration set has all of the weights you will need and more! Smooth surface The tweezers is Convenient to hold all of the weights for quick easy access Permissible Error: +/- 0.003g Quantity: 1 x 100g,1 x 50g,2 x 20g,1 x 10g, 1 x 5g Color: Silver Total Weight:250g INCLUDED : 1 x Plastic Storage Case 1 x Tweezers 1 x 100g Calibration Weights 1 x 50g Calibration Weights 2 x 20g Calibration Weights 1 x 10g Calibration Weights 1 x 5g Calibration Weights