Eisco-Cubes-for-Density-Investigation-Set-of-6-Eisco-PH0108P-P-A-set-of-six-20mm-cubes-fitted-with-a-hook-for-easy-handling-Each-cube-by-definition-has-identical-volume-but-widely-differing-weight-P-P-Materials-include-brass-lead-zinc-copper-aluminium-&-iron-P-Eisco-PH0108P-Cubes-for-Density-Investigation-20mm-Cubes-Set-of-6