304 Stainless Steel: The calibration weight is made of 304 stainless steel material, wear-resistant and anti-rust, sturdy and has long service life. The surface is smooth
25pcs Total: There are totally 25pcs weights varying from 1mg-1kg, which can meet various calibration needs
Aluminium Alloy Box: The weights are put in a aluminium alloy box, which can keep the weights from being damaged during transportation. The tweezer is included
Precision: The calibration weights are more precise than M1 grade, which has smaller permission error
Wide Application: The weights can be used for precision measurement, suitable for calibrating precision balance scales with an accuracy of 0.01-0.001g, widely used in laboratory, daily home uses and so on