A Set of Masses is high value resource for every year of the curriculum.This set of steel and brass masses in a strong storage tray allows children to weigh any item from 10g to 1990g by 10g divisions.Contents: 1 x 1kg 1 x 500g 1 x 200g 2 x 100g 1 x 50g 1 x 20g and 2 x 10g masses.