Description Each cylinder measures 1.18inch in length and is 0.71inch. Excellent for physics classrooms. Density metals 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 and Iron and Aluminum. - Size: 3.00 x 1.80 x 1.80cm/ 1.18 x 0.71 x 0.71 inch. - Set of 3 density cylinder. Set includes Iron, Copper, Aluminum. 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.Package list: 1 x copper 1 x iron 1 x aluminum