A set of cubes for density investigations, consisting of twelve 20mm sided cubes of different materials. Suitable for comparison of mass and density. Supplied in a wooden box, the cubes are numbered and listed on the box so the material type can be withheld from the students if required. Contents: Copper, Iron, Tin, Acrylic, Cork, Softwood, Brass, Aluminium, Zinc, Lead, Polythene, Hardwood.