Description: Fine Material: The educational toy is of fine optical glass made, which ensures the fine performance of the product. Early Education: The educational toy is very suitable to be used for science enlightening for your child. Teaching Tool: The educational toy is also suitable to be used in school for optical experiment. Portable: The educational toy is of small size and weight that can be easily taken to any places to use. Replacement: The teaching tool can also be regarded as a fine replacing choice when the old one gets broken by accident. Specification: Material: Optical Glass. Color: Shown as Picture. Size: Approx. 8x2.5x2.5cm/3.15x0.98x0.98inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Educational Toy.