Features: 1.The edge banding is round, strong toughness, not easy to break and high translucent. 2.Strictly selected high?toughness ABS plastic, environmentally friendly and tasteless. 3.Smoothly opening and closing, simple operation, can be used to strengthen students' cognitive ability and improve the quality of learning. 4.The surface is smoothly, the shape is regular, and the self?sticking scale can exercise the students' practical ability. 5.Cone surface area plastic sheet, bending soft and vivid showing the cone and the circle with height as the radius. specification:Item Type: Geometric Shapes Volume Demonstrator Material: Plastic+PP Image Demonstration: In a conical cylinder of equal base and equal height: V cone = 1/3V The cylinder is filled with water with a cone, and poured into the cylinder three times in a row, just filling the cylinder. The experiment vividly demonstrated the volume relationship between the cylinder and the cone and the formula reasoning. Self-sticking tick marks can exercise students' hands-on ability and deepen their understanding of knowledge. fill the cone with water, pour it into a cylindrical tube and stick the graduation line on the horizontal line. Cylinder Size: Approx. 10 x 15cm / 3.9 x 5.9in Cone Size: Approx. 10.3 x 15.8cm / 4.1 x 6.2in Plastic Sheet Size: Approx. 15.1 x 15cm / 5.9 x 5.9in PackageList: 1 x Cylindrical Barrel 1 x Cone Bucket 4 x Plastic Sheet 1 x Paste Scale Piece 2 x Blue Cylinder Disassembled 2 x Pink Cylinder Disassembled 17 x Green Cylinder Disassembled