AmScope 10x-20x-30x-60x Advanced All Metal Full Glass Optics Student Binocular Stereo Microscope with Incident (Top) and Transmitted (Bottom) Lights 10X-20X-30X-60X stereo magnification settings High quality widefield optical glass lenses Forward widefield binocular head Sturdy pillar stand with metal framework Built-in incident (top) and transmitted (bottom) lights