, high quality.Three-way parallel laser can improve their physics learning skills.Great for education and scientific research purposes.Our physical optics experiment laser is a great tool to conduct optical experiments.This physical optics experiment equipment is guaranteed to students' curiosity and love for science.Our physical optics experiment laser is made of plastic to easy portability.Size:. 10x6cm/3.94x2.36InchColour:GreenMaterial:PlasticPackage Contents:1 * Optical Experiment Laser EquipmentOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.