Features: This set of physics optics experiment props widely used for teaching physics, Small hole imaging experiment demonstration. Package contains: Optics Experiment Holder Stand, Pinhole plate, Pinhole Imaging Screen and Lighting Tool. Basic optical physics teaching aids, student physics educational tool. Suitable for classroom, school, labs. Help student and children learn the physical optics of refraction and reflection knowledge in easy way. Suitable for students and teachers to use in the demonstration of optical experiments, classroom, labs. Specifications: Color: Green Component: ABS Holder Size: Approximately. 50x13cm/19.68x5.11in Light Source Tool Size: Approximately. 6x10cm/2.36x3.93in Pinhole Imaging Board Size: Approximately. 8x12.50cm/3.15x4.92in Power Supply: 2Pcs No.7 batteries (BATTERIES ARE NOT INCLUDED!) Weight: Approximately. 333g Package Includes: 1Set Physics Optics Experiment Supplies note: NOTICE: Package not included 2Pieces No.7 batteries! Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. Due to difference between different monitors, the picture may not reflect the actual color