Item Type: Cubic Block Material: Copper + Iron + Aluminum + Wood Color: As shown in the picture Types: Copper, iron, aluminum, wood Product Size: Approx. 2x2x2cm / 0.8x0.8x0.8in 1It 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. 2Made of high?quality material, it is durable, wear?resistant and fall?resistant, and can be used for a long time. 3It is suitable for copper, iron, aluminum, wood, mechanical and physical experiments with the same volume and different mass density. 4These cubes group can effectively help students understand the law of calculation of object mass and promote the development of students'practical ability. 5Very simple and practical, simple operation, it has exquisite workmanship and excellent quality. It can be used as laboratory auxiliary tools.1. Please allow 1?2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1 x CopperBlock 1 x IronBlock 1 x AluminumBlock 1 x WoodBlock