A0233CUBESMATERIAL2CMAvarietyofmaterialsintheformofrectangular2cm 2cmblock,intendedtofamiliarisethestudentwiththeappearance,hardnessanddensityofarangeofcommonsubstances.Thekitcomprises11blocks,thatiswood,cord,artificialrubber,naturalrubber,perspex,aluminium,iron,copper,brassandlead.