About this item:
Set of 12 high-quality slotted brass weights with durable rack. Weights can be used for any STEM explorations or experimants. 

Weights included: 
* 1 x 500g
* 2 x 200g
* 1 x 100g
* 1 x 50g
* 2 x 20g
* 1 x 10g