This item is well made of premium steel with finish for and practical use. These items are used to calibrate digital scale so as to weight things more accurately.This calibration set has all of the weights you will need and more! It is suitable for general laboratory, commercial, and educational use. Feature - ColorAssorted Color - Material: Steel. - Package: 100g x 1+50g x 1+20g +10g x 1+5g x 1+ Nipper x 1. -Note: clip is random color - Made of steel chrome, this weights are rust and defect free. - Smooth surface :The tweezers is convenient to hold all of the weights for access. - Quality craftsmanship gives you peace of mind about an accurate scale. - Perfect for ensuring a properly calibrated scale. - This is a must have for anyone with a pocket scale. - Suitable for general laboratory, commercial, and educational use. Package list: 1 x set of Precision Steel Scale Weight Calibration Weights(5g 10g 2x20g 50g 100g)