1、It is used to measure the density of an object and, on the premise of knowing the density of a certain object, measure the volume of the object to calculate the mass of the object. 2、Made of high‑quality material, it is durable, wear‑resistant and fall‑resistant, and can be used for a long time. 3、It is sui for copper, iron, aluminum, wood, mechanical and physical experiments with the same volume and different mass density. 4、These cubes group can effectively help students understand the law of calculation of object mass and promote the development of students'practical ability. 5、Very simple and practical, simple operation, it has exquisite workmanship and excellent quality. It can be used as laboratory auxiliary tools.Item Type: Cubic BlockMaterial: Copper + Iron + Aluminum + WoodColor: As shown in the pictureTypes: Copper, iron, aluminum, woodProduct Size: Approx. 2x2x2cm / 0.8x0.8x0.8in 1 x CopperBlock1 x IronBlock1 x AluminumBlock1 x WoodBlock 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-Minnanxin