Description: Produced with fine workmanship, this calibration set is exquisite, smooth and has no defects. Adopting chrome plating technology and choice material, this calibration set has excellent quality, abrasion and corrosion resistant. These five calibration weights are made of steel, which has good hardness. The diameter of the 20g weight is 13mm, and its height is 24mm. It is suitable for chemistry experiments, scales and so on. Item Name: Weight Set Material:Steel Size Details: 20g: Diameter: 13mm/0.51, Height: 24mm/0.94 (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 5 X Calibration Weights (1/2/5/10/20g)