Features: The safe and environment-friendly base material is easy to use and operate safely. Folding tape scale of the demo fully shows the characteristics of refraction and reflection. Optics experiment demonstrator is conducive to improving childrens academic performance. The efforts and fine craftsmanship we put into the making of this product make for superior reliability. This optical experiment apparatus made of premium material, durable and practical optics teaching aids. Specifications: Material: Plastic Color: As The Picture Shows Package Weight: approx.1000g Size: approx.27.6x17x10cm/10.86x6.69x3.93in Package Includes: 1Pc x Light Full Refraction Demonstrator note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!