1、Educational Blocks: Set of 5 density blocks. set includes iron, copper, aluminum, wood block. includes a plastic snap case for convenient storage. 2、Wide Application: Density cubes set has a wide range of educational applications for all grade levels, including density investigation, specific heat and specific gravity exploration. 3、Fine Craftsmanship: Set of 5 density cubes are hand crafted, very accurate cubes with no edges. 4、Cautions: Due to the nature of the metal, some oxidization or due to humidity and storage may occur. 5、Compact Size: Density cubes set is small and compact in size, easy to use and store without taking up extra space. 5 x Cube1 x Storage Box Item Type: Density Cubes SetMaterial: Copper, Iron, Aluminum, Solid WoodUse: Laboratories, Schools, Testing Organizations