, .Three-way parallel laser can improve their physics learning skills.Great compatible with 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 compatible with 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.