Description: 18 pieces Geometric Models Set with cross section and auxiliary line include : cubes, cylinders, pyramid, sphere, cone, and rectangular solids 3D spatial visualization model, help kids learning solid geometry, improve space imagination Exploring : geometric construction & cross section & arris, volume, length of side, parallel, perpendicular relationship High school math manipulatives geometry teaching aids for student teacher supplies Made of plastic with smooth surface, easy to hold on hands,educational toy xams gift Material: plastic Color:As picture show Specification: Sphere (Dia) approx 9cm/ 3.54 inch Cube (L) approx 9cm/ 3.54 inch Cuboid (L*W*H) approx 9*7*4cm/ 3.54*2.75*1.57 inch Square prism (L*W*H) approx 10*5*5cm / 3.93*1.96*1.96 inch Triangular prism (L*W*H) approx 8.5*8.5*10cm/ 3.34*3.34*3.93 inch Hexagonal prisms (L*H) approx 6*10cm/ 2.36*3.93 inch Cyclinder (Dia*H) approx 9*10cm/ 3.54*3.93 inch Triangular pyramid (L*H) approx 10*11cm/ 3.93*4.33 inch Rectangular pyramid (L*H) approx 8.5*8.5cm/ 3.34*3.34 inch Square pyramid (L*H) approx 8.5*12cm/ 3.34*4.72 inch Pentagonal pyramid (L*H) approx 6*10.5cm/ 2.36*4.13 inch Hexagonal pyramid (L*H) approx 5*10cm/ 1.96*3.93 inch Circular cone (Dia*H) approx 9*12cm/ 3.54*4.72 inch Regular octahedron (L) approx 9cm/ 3.54 inch Package Includes: 18pcs 3D Geometric Model Toys Note: The color might be slight different from the picture due to some factors, such as lighting effect. Please allow slight deviation of measurement for manual measure.