Specification Brand : Dntum BulletPoint1 : Density Cylinder (aluminum, copper, iron) diameter 20mm, height 30mm BulletPoint2 : Density cube (aluminum, copper, iron, wood) side length 25mm BulletPoint3 : Suitable for density and specific gravity experiments BulletPoint4 : It is used to measure the density of an object and measure the volume of the object under the premise of understanding the density of the object, thereby calculating the mass of the object and exploring the relationship between the density, volume and mass of the object. BulletPoint5 : These are designed to be used in educational environments rather than using ultra-high precision machining. Tolerance is within +/- 5% of any specified size. ExternallyAssignedProductIdentifier : 7071545109117 ItemName : Cube Density/Cylinder Density, Copper Iron Aluminum Wood Block, Used in Specific Gravity Physics Experiment ItemTypeKeyword : science-classroom-measurement-kits Manufacturer : Dntum MetalType : other PartNumber : SYMXZJ0073461 ProductDescription : Density Cylinder (aluminum, copper, iron) diameter 20mm, height 30mm Density cube (aluminum, copper, iron, wood) side length 25mm Suitable for density and specific gravity experiments It is used to measure the density of an object and measure the volume of the object under the premise of understanding the density of the object, thereby calculating the mass of the object and exploring the relationship between the density, volume and mass of the object. These are designed to be used in educational environments rather than using ultra-high precision machining. Tolerance is within +/- 5% of any specified size.