Description Each cube excellent for physics classrooms. Density teaching equipment have a wide range of educational applications for all grade levels, including density investigation, specific heat and specific gravity exploration. Due to the nature of metals, some oxidation or corrosion due to humidity and storage may occur. Simply scuff any oxidation off to make the item look again. Features - Color: Assorted color.- Material: Copper, iron, aluminum and wood.- Size: 2.00 x 2.00 x 2.00 cm/ 0.79 x 0.79 x 0.79 inch.- Set of 4 density blocks. Set includes iron, copper, aluminum, wood block. Includes a plastic snap case for convenient storage.- Excellent for physics classrooms. Density cylinder have a wide range of educational applications for all grade levels, including density investigation, specific heat and specific gravity exploration.- Due to the nature of metals, some oxidation or corrosion due to humidity and storage may occur.- Simply scuff any oxidation off to make cube look again.- Designed to be used in an educational setting and are not fabricated using ultra high precision machining.Packing list: 4 x Density Blocks Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store