For general science and physics laboratory work.
All are made of stove enamelled cast iron masses except the 10g and 20g masses which are made of polished brass. Packed in a cardboard box.
Set of 5 masses: one each of 50g,100g, 200g, 500g and 1000g
Set of 7 masses: one each of 10g, 20g, 50g,100g, 200g, 500g and 1000g
Set of 9 masses: one each of 10g, 50g, 100g, 500g and 1000g and two each of 20g and 200g.