Periscope Model Laboratory Detachable Optical Reflection School Teaching Physics Experiment, Black, 30cm Product features: 1. The periscope lens can adjust the direction 360 degrees 2. The lens can be disassembled freely, which is easier for children to understand and easy to clean 3. The tube body is set, which is more convenient for children to grasp4. Multiple can be spliced together Note: Manual measurement, there may be 1-2cm or 1-3g error, which is not a quality problem. Due to different screen displays, there may be a color difference between the real object and the picture. Delivery Quantity: 1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.