This cal weights kit includes a wide range of calibration weight masses 10g - 500g (1000g or 1kg total), carrying case and tweezers. Perfect for checking the accuracy of your precision digital or mechanical scales. Different scales need different size weighs to calibrate them. Please be sure you are taking the correct size weight for the scale you would like to use it with. Most scales that we sell that can be calibrated state the correct weight needed in the scales description page. If in doubt Please contact us and we will let you know the correct weight needed for any of the scales sold on our site. It is a universal weight and the picture is for sample only. Shape and style may very. Class: M2 Suitable for general laboratory, commercial, and educational useTweezers IncludedSeven gram weights included (1000g or 1kg Total) - one 500g- one 200g- two 100g- one 50g- two 20g- one 10g Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store