This is SAPIX's [Recommended Material] The Cube. 1) 9 types of cube blocks 2) 9 types of nets (with cut lines) 3) 11 types of nets (plain) 4) 1 hard clear case 5) Instruction manual All of the above accessories are included. [Product Condition] The acrylic nets, which can be written on with water-based pens, have no writing on them. This is a home-stored item, so please only purchase if you understand this. "The Cube" was devised to make it easy to understand how the shape of the cross-section and the cut surface correspond to the net when a cube is cut from various directions. It is an educational toy that seems to have been missing until now. The material is hard rubber, and magnets are embedded in the colorful cut surfaces. In addition, all 11 types of transparent vinyl nets and the acrylic case can be widely used to understand actual test problems. Cube size: 3 x 3 x 3 cm Set outer dimensions: 14.5 x 10 x 4 cm Immediate purchase is OK.